2008 Amendment Cycle 2 DRCOG Conformity Determination Conformity Determinati… · iii ABSTRACT . TITLE: 2008 Amendment Cycle 2 DRCOG Conformity Determination (CO, PM 10, and 1-hour

2008 Amendment Cycle 2

DRCOG Conformity Determination (CO, PM10, and 1-hour Ozone)

for the

Amended Fiscally Constrained 2035 Regional Transportation Plan and the

Amended 2008-2013 Transportation Improvement Program

Adopted January 21, 2009

Denver Regional Council of Governments 1290 Broadway, Suite 700

Denver, CO 80203

Preparation of this report has been financed in part through grants from the U.S. Department of Transportation, Federal Transit Administration,

and Federal Highway Administration

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ABSTRACT TITLE: 2008 Amendment Cycle 2 DRCOG Conformity Determination

(CO, PM10, and 1-hour Ozone) for the Amended Fiscally Constrained 2035 Regional Transportation Plan and the Amended 2008-2013 Transportation Improvement Program

AUTHOR: Denver Regional Council of Governments SUBJECT: Air quality conformity of the Denver region's long-range

transportation plan and short-range improvement program DATE: Adopted January 21, 2009 SOURCE OF COPIES: Public Information and Communications Office DRCOG 1290 Broadway, Suite 700 Denver, CO 80203 (303) 455-1000 NUMBER OF PAGES: 119 ABSTRACT: Demonstration of the Denver region's timely implementation of

adopted Transportation Control Measures and meeting of federally prescribed air pollution emissions tests.

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TABLE OF CONTENTS

1. INTRODUCTION ........................................................................................................ 1 Federal Requirements.......................................................................................................1 Current Situation ...............................................................................................................4 Process .............................................................................................................................8

2. IMPLEMENTATION OF CONTROL MEASURES ................................................... 11

Transportation Control Measures....................................................................................11 Timely Implementation Criteria .......................................................................................12

3. EMISSIONS TESTS................................................................................................. 15

General Description ........................................................................................................15 Technical Process...........................................................................................................18 Control Measures............................................................................................................24 Mobile Source Measures ................................................................................................26 Emission Test Results.....................................................................................................27

APPENDIX A TRANSPORTATION NETWORK ASSUMPTIONS ............................... 30 APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION ............. 67 APPENDIX B ................................................................................................................ 69

Introduction .....................................................................................................................69 The Model Refresh Phase: Description and Elements...................................................70 Demographic Development Estimation...........................................................................71 Small Area Development Estimates................................................................................73 Highway and Transit System ..........................................................................................74 Trip Generation ...............................................................................................................74 Trip Distribution ...............................................................................................................77 Mode Choice ...................................................................................................................77 Travel Time-of-Day .........................................................................................................78 Network Assignment .......................................................................................................78 Model Calibration ............................................................................................................79 Air Quality Modeling ...................................................................................................... 81

APPENDIX C PM10 STREET EMISSIONS REDUCTION COMMITMENTS............ 83 APPENDIX D U.S. DEPARTMENT OF TRANSPORTATION CONFORMITY FINDING (TO BE PROVIDED)........................................................ 117 APPENDIX E LIST OF ACRONYMS...................................................................... 119

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LIST OF TABLES Table 1 Conformity Emissions Tests.......................................................................... 16

Table 2 Population and Employment Forecasts......................................................... 18

Table 3 2035 Population and Employment Estimates by County............................... 19

Table 4 Conformity Emissions Test Results............................................................... 29

LIST OF FIGURES Figure 1 Denver Transportation Management Area .....................................................2

Figure 2 Air Quality Attainment Maintenance Areas...................................................17

1. INTRODUCTION Federal Requirements

The Denver Regional Council of Governments (DRCOG) is the Metropolitan Planning

Organization (MPO) for the Denver Transportation Management Area (TMA). Figure 1 displays

the TMA that now includes southwestern Weld County as approved by the Governor on

February 21, 2008. The MPO is required to show conformity of its fiscally constrained

transportation plan and Transportation Improvement Program (TIP) with the State

Implementation Plan (SIP) for air quality before these transportation plans and programs are

adopted. This action is required under Section 176(c) of the Clean Air Act, as amended in

1990. Conformity to an air quality implementation plan is defined in the Clean Air Act as

conformity to the implementation plan's purpose of eliminating or reducing the severity and

number of violations of the National Ambient Air Quality Standards (NAAQS) and achieving

expeditious attainment of such standards. In addition, activities may not cause or contribute to

new violations of air quality standards, exacerbate existing violations, or interfere with the timely

attainment of required emissions reductions towards attainment. For pollutants for which a

region currently meets standards but was formerly in nonattainment, the applicable SIP may

also be referred to as a maintenance plan, which demonstrates continued attainment of the

standards.

The U.S. Environmental Protection Agency (EPA) final transportation conformity rule is located

at 40 CFR Part 93. To address revised standards and changes in conformity requirements,

EPA has promulgated several amendments to the final rule in recent years. On July 1, 2004,

EPA issued amendments which addressed:

Conformity regulations for the new 8-hour ozone and fine particulate matter (PM2.5) NAAQS.

The incorporation of existing federal guidance that is consistent with a U.S. Court of Appeals

decision.

The streamlining and improving of EPA’s existing transportation conformity rule1.

1 40 CFR Part 93

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On March 10, 2006, EPA issued revisions addressing PM2.5 and PM10 Hot-Spot Analyses in

Project-Level Transportation Conformity Determinations. These project-level conformity

analyses are the responsibility of project sponsors. This conformity finding covers plan and

program level conformity only.

On January 9, 2008, the EPA administrator signed an amendment to the conformity rule, (the

“Final Rule”), to implement the provisions of SAFETEA-LU. The Final Rule was promulgated

February 25, 2008. No changes were made to the process used in developing this conformity

documentation, as none were applicable.

The EPA criteria and procedures vary according to the status of the State Air Quality

Implementation Plans for individual pollutants. Transportation plans and programs must satisfy

different criteria depending on whether the state has submitted a SIP revision, and whether the

EPA has approved such submittal.

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In addition to the emissions tests, the region must demonstrate timely implementation of

adopted Transportation Control Measures (TCMs). The transportation community is held

responsible for implementing TCMs to which the state committed in the various pollutant SIPs.

The U. S. Department of Transportation and EPA issued Interim Guidance for Implementing the

Transportation Conformity Provisions in the Safe, Accountable, Flexible, Efficient Transportation

Equity Act: A Legacy for Users (SAFETEA-LU) on February 14, 2006. The guidance was

issued to address changes in the Clean Air Act as amended by SAFETEA-LU. The document

addresses each of the revisions and explains how to implement the changes during the period

before federal conformity rules are revised. The majority of this guidance is superseded by the

Final Rule mentioned above, and EPA will update this guidance shortly.

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Current Situation

Transportation Planning The Metro Vision 2035 Plan is the long-range growth and development strategy for the Denver

region. It integrates plans for growth and development, transportation, and environmental quality

into a single comprehensive foundation for regional planning. Metro Vision calls for a balanced

multimodal surface transportation system, including rapid transit, a regional bus network, a

regional beltway, bicycle and pedestrian facilities, and improvements to the existing roadway

system.

The regional transportation plan is based on the principles of Metro Vision. The 2035 Metro

Vision Regional Transportation Plan (MVRTP) is the transportation plan that implements the

transportation element of Metro Vision. The planning process began in late fall 2006 when the

transportation needs were identified for all expenditure categories. Potential revenue sources

were tabulated. Because of cost increases and a flat estimate of reasonably anticipated

revenues, only roadway capacity expansion improvements contained in the prior (2030) Fiscally

Constrained Regional Transportation Plan (RTP) were considered for inclusion in the Fiscally

Constrained 2035 RTP. Those roadway capacity expansion improvements were re-evaluated,

scored, and ranked using the criteria-based system used for 2030 and described in the MVRTP.

Finally, improvements were selected for inclusion in the Fiscally Constrained 2035 RTP. The

2035 MVRTP and Fiscally Constrained 2035 RTP were adopted on December 19, 2007.

The 2035 fiscally constrained RTP is proposed for amendment to reflect expansion of the

DRCOG TMA into Weld County and other additions or changes to locally and state/federally-

funded roadway and transit projects. These amendments were submitted as part of the

integrated annual Metro Vision Assessment Process. Through this mechanism, DRCOG

ensures that its regional plans reflect the most current information about the existing and future

conditions of the region. It also provides a regular opportunity to consider amendments to the

regional plans.

Short-range programming of needed transit, alternative mode, and highway improvements is

reflected in this conformity finding documentation. The programming process began with

approval in June 2007 of new TIP policies. Requests were evaluated by considering

reconstruction, resurfacing, safety, capacity, and other needs. The resulting program

implements the Fiscally Constrained 2035 RTP in that projects funded through the 2008-2013

TIP are either identified in the Fiscally Constrained 2035 RTP or are consistent with the

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management portions of the plan. The 2008-2013 TIP was adopted on March 19, 2008 and is

amended quarterly. DRCOG committed through this process to fund high priority TCMs identified

and adopted through the SIP process.

Air Quality Planning The status of air quality planning is important as it determines the emissions tests that must be

met to find conformity.

The latest revision to the carbon monoxide (CO) maintenance plan for Longmont established the

emissions budget at 43 tons per day (tpd) for 2010 and beyond. On May 3, 2007, EPA found the

revised CO budget of 43 tpd “adequate” for use in conformity determinations. EPA’s approval

of this latest Longmont CO Maintenance Plan revision became effective on October 16, 2007.

The most recent revised CO maintenance plan for Denver, approved by the Colorado Air Quality

Control Commission (AQCC) on December 15, 2005, established the emissions budget at 1,625

tpd through 2020, and 1,600 tpd for 2021 and beyond. On May 3, 2007, EPA found the revised

CO budget of 1,600 tpd adequate for use in conformity determinations for 2021 and beyond.

EPA’s approval of the revised Denver CO Maintenance Plans became effective October 16, 2007.

The State of Colorado submitted the latest Denver particulate matter less than 10 microns in

size (PM10) maintenance plan to the EPA in December 2005. EPA approved this latest PM10

SIP Revision on January 7, 2008. This latest PM10 Maintenance Plan revision contains the PM10

budgets of 54 tpd and 55 tpd for the years 2015 through 2021, and 2022 and beyond,

respectively, as well as the wintertime NOx budgets of 70 tpd and 56 tpd for the years 2015

through 2021, and 2022 and beyond, respectively.

The Regional Air Quality Council (RAQC), in cooperation with the state, prepared a maintenance

plan for the 1-hour ozone standard. The maintenance plan was submitted to the EPA in May

2001. Based on this submittal, effective October 11, 2001, the EPA approved the Denver 1-hour

ozone standard redesignation request, the maintenance plan, and the volatile organic compounds

(VOC) and summertime NOx transportation conformity budgets of 119 and 134 tpd, respectively,

for 2002 and beyond.

The EPA currently has two NAAQS for ozone, the 1-hour standard and the 8-hour standard. The

maintenance plan and associated documents for the 1-hour standard are described above. Based

on the 2001-2003 three-year average, the Denver region is in violation of the 8-hour standard. EPA

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found Denver to be in nonattainment for the 8-hour ozone standard in April 2004. However, the

EPA deferred this designation until 2007 as DRCOG, RAQC, Colorado Department of Public Health

and Environment (CDPHE), AQCC, and Colorado Department of Transportation (CDOT) entered

into the Ozone Early Action Compact and subsequently developed and implemented an Early

Action Plan. The Denver region violated the standard during the 2007 summer ozone season for

the three-year 2005-2007 average, and on November 20, 2007, was formally designated in

nonattainment under the 8-hour ozone standard. The initial interim conformity determination under

the 8-hour standard for the Denver-North Front Range Region was approved by DRCOG and the

NFRMPO in October, 2008 and is pending final acceptance by FHWA. The interim 8-hour

conformity determination for Cycle 2 amendments is being prepared concurrently under separate

cover. The ozone emissions test using the 1-hour ozone standard is the requirement for the

conformity determination at this time.

PM2.5

On October 17, 2006, EPA published a final rule that lowered the 24-hour PM2.5 standard from the

1997 level of 65 micrograms per cubic meter (μg/m3) to 35 μg/m3, and retained the annual standard

of 15.0 μg/m3. Although the Denver region is currently not in danger of violating this standard, the

same grace period applies to any nonattainment designation under the PM2.5 standard.

Air Quality Situation The region has been redesignated attainment maintenance for CO, PM10, and ozone (1-hour

standard). The pollutants and their violation status for the Denver region include:

Carbon Monoxide – A violation of the carbon monoxide standard occurs when a monitoring

station shows more than one exceedance per year of the 8-hour (9 parts per million (ppm)) or

1-hour (35 ppm) standard. The carbon monoxide standard was last violated in 1995. In 2006,

the Department of Public Health and Environment measured a 1-hour reading of 9.3 ppm at

the Firehouse #6 station located at Speer Boulevard and Auraria Parkway, which was

approximately 26.6 percent of the federal health 1-hour standard of 35 ppm. The state health

department also measured 3.4 ppm at the Continuous Air Monitoring Project (CAMP) station,

located at 2105 Broadway, which was approximately 37.7 percent of the federal health 8-hour

standard of 9 ppm (reading on second highest day, averaged over eight hours).

PM2.5 – An exceedance of the PM2.5 standard occurs when a monitoring station exceeds the

annual average of 15 micrograms μg/m3 or the 24-hour average of 35 μg/m3. If the 24-hour

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standard is exceeded more than three times over a three-year period, it is a violation. The

highest 24-hour reading in 2006 was 37.8 µg/m3 recorded at the CAMP station, which exceeded

the 24-hour standard of 35 µg/m3, but was not a violation because the three-year average was

below 35 µg/m3. The state health department also recorded an annual reading of 9.89 µg/m3 at

the Commerce City station, located at 7101 Birch Street, which is approximately 65.9 percent of

the federal annual average standard.

PM10 – An exceedance of the PM10 standard occurs when a monitoring station exceeds a

24-hour average of 150 µg/m3. If the 24-hour standard is exceeded more than three times over

a three-year period, it is a violation. The PM10 standard was last violated on three days in 1993.

The highest reading in 2006 was 115 µg/m3 recorded at 7101 Birch Street, Commerce City

station, which is approximately 76.7 percent of the federal standard of 150 µg/m3 averaged over

24 hours.

1-Hour Ozone – As noted in the 1-hour Ozone Attainment SIP, the standard is attained when the

expected number of days per calendar year with maximum hourly average concentrations above

0.12 ppm is equal to or less than one. In practice, the fourth exceedance of 0.125 ppm at the

same monitor in a three-year period results in a violation. The 1-hour ozone standard was last

violated in 1988. The highest recent reading was 0.112 ppm in 2006 at the Welch Station,

located at 12400 W. Highway 285, which was approximately 90 percent of the federal 1-hour

standard of 0.12 ppm.

8-Hour Ozone – A violation of the 8-hour ozone standard occurs when the three-year average

of the annual fourth-highest daily maximum 8-hour ozone concentration at one monitor exceeds

the federal standard of .08 ppm. Due to rounding, a three-year average of the fourth maximum

value of 0.085 ppm or greater would constitute a violation. In the 2007 ozone season (June,

July, and August), the Denver region violated the 8-hour ozone standard, as the 2005-2007

three-year average of the fourth maximum value at the Rocky Flats monitor was 0.085 ppm.

The 2007 summer ozone season saw 20 values of 0.085 ppm and higher scattered throughout

the 13 monitors in the 8-hour ozone control area.

Based on this violation, on November 20, 2007, EPA officially designated the Denver region to be

in nonattainment of the 8-hour ozone standard. However, because the conformity requirements

take effect one year after the nonattainment designation, conformity to the 1-hour standard still

applies for this conformity determination.

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Process

Agency Roles The Conformity SIP was developed by the AQCC and adopted in 1998. It formally defines the

process for finding conformity. In November / December 1998, a memorandum of agreement

was signed by the Colorado Department of Public Health and Environment and DRCOG for the

purpose of defining the specific roles and responsibilities in conformity evaluations and findings.

The EPA approved the Conformity SIP on September 21, 2001 (66FR48561). This makes the

Conformity SIP federally enforceable.

DRCOG, as the MPO, and the Federal Transit Administration (FTA) and Federal Highway

Administration (FHWA), as representatives of the U.S. Department of Transportation, are

charged with determining conformity for the Denver TMA. The process of developing the

Fiscally Constrained RTP and TIP conformity determination has been a cooperative one

between the RAQC, the Colorado Department of Public Health and Environment's APCD, the

EPA, the FHWA, the FTA, the CDOT, the Regional Transportation District (RTD), and DRCOG.

2008 Amendment Cycle 2 In June 2008, DRCOG solicited its member governments as well as RTD and CDOT for 2008

Cycle 2 amendments to the 2035 Regional Transportation Plan. These included the definition

of facilities and projects in the southwest portion of Weld County recently added to DRCOG.

During the development of the conformity finding, federal regulations require the MPO to consult

with the state and regional air quality agencies, local transportation agencies, CDOT, RTD and

EPA. DRCOG used the Metropolitan Planning Organization’s Agency Coordination Team

(ACT) as the primary group for interagency consultation. Upon receipt of the amendment

requests in July 2008, the amendments were vetted through internal DRCOG staff, and,

subsequently discussed and reviewed by the ACT, Transportation Advisory Committee, and

Regional Transportation Committee. The ACT reviewed the definition of conformity tests that

must be met and the key demographic and network definition assumptions. CDOT reviewed

and commented on the highway networks. RTD assisted in defining the transit networks. A list

of the proposed 2008 Cycle 2 amendments can be found in Chapter 3 - “Emission Tests.”

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Public Participation Public participation was encouraged throughout the development of the 2035 MVRTP, including

the Fiscally Constrained 2035 RTP, the 2008-2013 TIP and this conformity finding. Public

hearings (and associated 30-day comment periods) were held before the DRCOG Board for the:

2035 Metro Vision Regional Transportation Plan and its original conformity document on

December 5, 2007.

2008-2013 TIP on February 20, 2008.

2035 MVRTP 2008 Cycle 1 amendments and conformity document on July 16, 2008.

2035 MVRTP 2008 Cycle 2 amendments and this conformity document on December

17, 2008.

Summaries of testimony received at public hearings are available at the DRCOG office.

Members of the public are also encouraged to provide input to their local elected officials and

government staff who work closely with DRCOG staff on these processes.

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2. IMPLEMENTATION OF CONTROL MEASURES Transportation Control Measures

The transportation plan and program must provide for the timely implementation of adopted

Transportation Control Measures (TCM) from the applicable implementation plan. The state air

quality implementation plan identified a number of TCMs that were funded and completed in

past TIPs. The implementation of rail transit was a substantial TCM, first defined in the 1979

Carbon Monoxide SIP and the 1982 Ozone SIP.

The region’s first segment of light rail, which opened in October 1994, provides service from the

downtown area south to Broadway and I-25. The first extension of this service, the southwest

corridor, from Broadway and I-25 to Mineral Avenue along Santa Fe Boulevard, opened in July

2000.

An extension of light rail service into the Platte Valley opened in April 2002. Funding came from

a private-public partnership that included DRCOG, RTD, Denver and the private sector.

The southeast corridor light rail transit was completed in November 2006. It was the last

remaining partially completed TCM. It includes light rail service along I-25 from Broadway

south to Lincoln Avenue, as well as a light rail spur along I-225 from I-25 to Parker Road. With

the completion of the southeast corridor, the region has 35 miles of light rail transit serving

suburban and urban commuters.

RTD has expanded its bus fleet from 628 in 1969 to 1,066 as of May 2008. This fleet expansion

and related increase in service has provided some emissions reduction to offset the delay of the

light rail transit control measure.

Beyond the SIP measures, the Fiscally Constrained 2035 RTP and 2008-2013 TIP continue

funding for transportation demand management (TDM) actions through:

The regional RideArrangers commuter services program.

A separate TDM grant program that supports subregional efforts, including programs

proposed by the corridor and subarea transportation management organizations (TMO).

The 2008-2013 TIP also continues congestion mitigation/air quality funding (CMAQ) funding to

assist in implementation of the FasTracks program, for local bus service initiatives, for

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bike/pedestrian projects at/near future FasTracks stations, and for Boulder County’s Ethanol

Fuel Implementation Program.

The 2008-2013 TIP includes funding for three specific air quality agency projects:

Ozone Modeling and Analysis (CDPHE and RAQC) Ozone Aware Program (RAQC)

New Energy Fleets Collaborative (Diesel Retrofit) (RAQC)

Five new CMAQ air quality improvement projects are included in the 2008-2013 TIP. They are:

Exposition Light Rail Station Area Master Plan

40th/40th Station Operation Study: Next Phase S. Westminster Transit Station Area Concept Plan: 71st/Lowell

Swansea Station Area Master Plan

Welton/Downing Corridor Station Master Plan

A pool for additional station area plans was also established with CMAQ funds.

The TIP also includes continuation of funding for 20 bike/ped projects and 8 roadway

operational projects indicated in previous TIPs with enhancement and STP-Metro funds and

adds 11 bike/ped and 7 roadway operations projects newly selected.

Timely Implementation Criteria

The transportation plan must meet two conditions to demonstrate timely implementation of TCMs:

The transportation plan, in describing the envisioned future transportation system, provides

for the timely completion or implementation of all TCMs in the applicable implementation

plan which are eligible for funding under Title 23 USC or the Federal Transit Act, consistent

with the schedule included in the applicable implementation plan.

The Fiscally Constrained 2035 RTP identifies the metropolitan transportation system of travel

demand actions, operational improvements, and capital-intensive roadway, high-occupancy

vehicle, and transit facilities, and contains policies to guide the implementation of the plan.

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There are no remaining TCM’s to be implemented. The Denver Regional Element of the State

Air Quality Implementation Plan and the Fiscally Constrained RTP are consistent documents.

Nothing in the transportation plan interferes with the implementation of any TCM in the

applicable implementation plan.

The DRCOG committees and Board review the goals, policies, recommendations, and

improvements identified in the Fiscally Constrained RTP. No conflicts exist with any specific

requirements in commitments of the adopted SIP. The Fiscally Constrained RTP does not

prohibit implementation of any SIP TCM, nor does it make it impossible to implement any

SIP TCM.

TCMs contained in the SIP, but not directly related to the Fiscally Constrained RTP, given

their non-facility planning nature, include the federal Motor Vehicle Emissions Control

Program, Inspection and Maintenance Program, stationary source controls, display signs

instructing motorists to turn off engines, warranty enforcement, and gasoline high altitude

emissions research. The Fiscally Constrained 2035 RTP contains no policies that inhibit the

implementation of these measures.

For a TIP to provide for the timely implementation of TCMs, three criteria must be satisfied:

TCMs, which are eligible for funding under Title 23 USC of the Federal Transit Act, are on or

ahead of the schedule established in the applicable implementation plan, or, if such TCMs are

behind schedule, the MPO and DOT have determined the past obstacles to implementation

have been identified and overcome.

An examination of the projects listed in the 2008-2013 TIP shows that adequate funding is

provided for all ongoing control measures and programs related to TCMs, including:

Continued expansion of the bus fleet.

Transportation demand management activities.

PM10 reduction measures (diesel retrofit)

The regional RideArrangers program.

The regional traffic signalization program.

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If TCMs have previously been programmed, but funds have not been obligated and the

TCMs are behind schedule, then the TIP cannot be found to conform if the funds intended

for these TCMs are reallocated to projects in the TIP other than TCMs.

This situation has not occurred. Programmed funds for TCMs have been obligated.

Nothing in the TIP may interfere with implementation of any TCM in the applicable

implementation plan.

The DRCOG committees and Board review the projects identified in the 2008-2013 TIP.

No conflicts exist with any specific requirements or commitments of the adopted SIP. The

TIP does not prohibit implementation of any SIP TCM, nor does it make it impossible to

implement any SIP TCM.

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3. EMISSIONS TESTS General Description

The transportation plan and program must pass a series of emissions tests to demonstrate

conformity. These emissions tests relate to the pollutants and their precursors for which the

Denver region is designated as attainment-maintenance of the NAAQS.

These pollutants and precursors include:

Carbon monoxide (CO)

Volatile organic compounds (VOCs) as a precursor for ozone

Nitrogen oxides (NOx) as a precursor for ozone (summertime estimate)

PM10

Nitrogen oxides (NOx) as a precursor for PM10 (wintertime estimate)

Each pollutant and precursor in specific geographic areas must pass a number of tests. The plan

and program must respect the motor vehicle emissions budget in the applicable SIP or SIP

submittal. Satisfying these tests generally involves demonstrating that relevant emissions in future

years are less than or equal to the emissions budget found in the applicable maintenance plan.

As required by 40 CFR 93.118, consistency with the motor vehicle emissions budget(s) must be

demonstrated for each year for which the applicable implementation plan specifically establishes

motor vehicle emissions budget(s), for the attainment year (if it is within the timeframe of the

transportation plan), for the last year of the transportation plan’s forecast period, and for any

intermediate years as necessary so that the years for which consistency is demonstrated by

analysis are no more than ten years apart.

In addition, when a maintenance plan has been submitted, emissions must be less than or equal

to the motor vehicle emissions budget(s) established for the last year of the maintenance plan

and any year for which the maintenance plan establishes budgets.

Applying these tests for the prescribed time periods for each of the pollutants results in 34

emissions tests as listed in Table 1.2 The analysis areas are shown in Figure 2.

2 Transportation model runs represent the beginning of a calendar year. Test dates listed in Table 1 refer

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Table 1 Conformity Emissions Tests

Pollutant and Area Tests

Carbon Monoxide in Denver Attainment Maintenance Area3

2013 staging ≤ Budget of 1,625 tpd4 2015 staging ≤ Budget of 1,625 tpd 2020 staging ≤ Budget of 1,625 tpd

2021 staging ≤ Budget of 1,600 tpd4, 5 2030 staging ≤ Budget of 1,600 tpd Fiscally Constrained 2035 RTP ≤ Budget of 1600 tpd

Carbon Monoxide in Longmont Attainment Maintenance Area3

2010 staging ≤ Budget of 43 tpd4

2015 staging ≤ Budget of 43 tpd 2020 staging ≤ Budget of 43 tpd5

2030 staging ≤ Budget of 43 tpd

Fiscally Constrained 2035 RTP ≤ Budget of 43 tpd

PM10


2020 staging ≤ Budget of 54 tpd 2022 staging ≤ Budget of 55 tpd4,5



NOx associated with PM10


2015 staging ≤ Budget of 70 tpd 2020 staging ≤ Budget of 70 tpd

2022 staging ≤ Budget of 56 tpd4, 5



VOC in 1-Hour Ozone Attainment Maintenance Area7

2006 staging ≤ Budget of 119 tpd4 2013 staging ≤ Budget of 119 tpd8

2015 staging ≤ Budget of 119 tpd 2020 staging ≤ Budget of 119 tpd 2030 staging ≤ Budget of 119 tpd


NOx in 1-Hour Ozone Attainment Maintenance Area7

2006 staging ≤ Budget of 134 tpd4 2013 staging ≤ Budget of 134 tpd8 2015 staging ≤ Budget of 134 tpd

2020 staging ≤ Budget of 134 tpd 2030 staging ≤ Budget of 134 tpd Fiscally Constrained 2035 RTP ≤ Budget of 134 tpd

to model run dates. 3 EPA approval is effective October 16, 2007. 4 This is the year the budget was established in the maintenance plan. 5 EPA adequacy finding effective June 28, 2007. 6 EPA approval of PM10 Maintenance Plan, effective January 7, 2008. 7 Conformity still based on 1-hour standard. 8 This is the last year of the 1-hour ozone maintenance plan.

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Technical Process

The technical process used to estimate future pollutant emission levels is based on the latest

planning assumptions in effect at the time of this conformity determination. Assumptions behind

the analysis were derived from estimates of current and future population, employment, travel,

and congestion most recently developed by DRCOG. Information concerning travel and

congestion estimates was updated as part of this conformity finding process. The above-

mentioned factors were used with the latest EPA emission model (MOBILE 6.2) to estimate

emissions.

Demographic Assumptions The population forecast for the full DRCOG region in 2035 is 4,341,600. This is an increase of 61

percent over the year 2005 estimated population of 2,697,300. Employment is forecast to be

2,566,000 in 2035 compared to the year 2005 estimate of 1,568,200, an increase of 64 percent.

Growth in population and employment will be the principal factor for the increased demand for travel

on the region’s transportation facilities and services. Table 2 shows the latest forecasts of

population and employment for 2005, 2015, 2020, 2030, and 2035 for the DRCOG area. Table 3

lists 2035 population and employment estimates by each of the nine counties, as well as the small

portion of Weld County that is within the DRCOG region.

Table 2 Population and Employment Forecasts

DRCOG Region 2005 2015 2020 2030 2035

Population 2,697,300 3,133,900 3,420,400 4,024,200 4,341,600

Employment 1,568,200 1,974,950 2,126,900 2,422,400 2,566,000

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Table 3 2035 Population and Employment Estimates by County

Population Employment County 2005 2005 2035 2035

Adams 409,200 773,500 175,700 431,800

Arapahoe 531,700 890,200 318,800 473,500

Boulder 294,000 386,600 177,600 213,200

Broomfield 46,500 107,400 35,000 102,700

Clear Creek 9,700 16,900 3,400 5,600

Denver 579,500 760,900 487,600 706,200

Douglas 246,900 554,400 103,400 225,000

Gilpin 5,100 14,900 5,400 8,100

Jefferson 536,700 695,100 254,100 357,000

Weld County portion 38,000 141,600 7,200 43,000

TOTAL DRCOG Region

2,697,300 4,341,600 1,568,200 2,566,000

Transportation Assumptions In order to complete the emissions tests, the 2015, 2020, 2030, and 2035 transportation networks

must first be defined. DRCOG’s Fiscally Constrained 2035 RTP specifies financially constrained

highway and transit transportation system improvements and resulting networks to be completed

by the year 2035. The detailed list of improvement projects by completion year is displayed in

Appendix A. The most significant highway and transit projects are listed below.

The 2008-2013 TIP advances a number of regionally significant projects that are contained in the

Fiscally Constrained 2035 RTP. They include:

Federal Boulevard from Alameda to 6th Avenue: widen roadway to six lanes.

US-85 from Titan Road to Castle Rock: widen roadway to four lanes.

US-285 from Foxton to Jefferson County line: widen roadway to four lanes, improve

intersections.

SH-121/Wadsworth Boulevard at Grandview Avenue (BNSFRR): grade separation, widen

roadway.

19

SH-121/Wadsworth Boulevard at Grandview Avenue (BNSFRR): grade separation, widen

roadway.

Arapahoe Road at Parker Road: new grade-separated interchange.

I-70/SH-58 and Ward Road (south ramps) Interchanges: construct new ramps.

West Corridor, Central Corridor to Jefferson County Center: new light rail, stations, park-n-

Rides.

Gold Line, Denver Union Station to Ward Road: new light rail, stations, park-n-Rides.

I-225 Corridor, Parker Road to Smith Road: new light rail, stations, parking.

North Metro Corridor, Denver Union Station to 160th Avenue: new rail, stations, parking.

Southeast Corridor: rail, stations, parking.

Southeast Corridor, Lincoln Avenue to RidgeGate Parkway Extension: extend light rail with

stations, park-n-Ride.

Southwest Corridor, Mineral Station to C-470 Extension: extend light rail, new park-n-Ride.

Northwest Rail, Denver Union Station to Longmont: new rail, stations, parking.

US-36 BRT, Denver Union Station to Table Mesa: new slip ramps, access improvements,

park-n-Rides.

Central Corridor; 30th & Downing to 40th & 40th Extension: new light rail and stations.

East Corridor, Denver Union Station to Denver International Airport: new rail, stations, and

park-n-Rides.

Denver Union Station: intermodal center.

I-225, Parker Road to I-70: widen roadway to six lanes.

US-36, 120th Avenue Connection: build new six lane road.

56th Avenue from Quebec to Havana: widen roadway to six lanes.

I-25/Ridgegate: new interchange.

SH-83 from Bayou Gulch Road to Hilltop Road: widen roadway to six lanes.

I-25 from Santa Fe to Alameda: interchange improvements.

Regional highway projects in the Fiscally Constrained 2035 RTP using federal and state

resources, in addition to those listed above, include:

20

SH-121/Wadsworth Boulevard from 36th Avenue to 46th Avenue: widen roadway to six

lanes.

SH-121/Wadsworth Parkway from 92nd Avenue to SH-128/120th Avenue: widen roadway to

six lanes.

104th Avenue from Colorado Boulevard to US-85: widen roadway to four lanes.

I-25 South from Douglas Lane to Meadows Parkway: widen roadway to six lanes.

I-25 South from Meadows Parkway to C-470: widen roadway to eight lanes.

I-70 Viaduct (East Corridor): Brighton Boulevard to York Street: roadway reconstruction and

interchanges.

I-70 East from I-270 to Havana Street: widen to eight lanes.

SH-7 Arapahoe Road from Cherryvale Road to VoTech Drive: widen roadway to four lanes.

US-285 Hampden Avenue from Colorado to I-25: widen roadway to six lanes.

SH-30 Hampden Avenue from Dayton to Havana: widen roadway to six lanes.

I-25 from US-36 to Thornton Parkway: widen to eight lanes.

I-270 from Vasquez to Quebec Street: widen to six lanes.

US-36 from Foothills Parkway to I-25: build HOV lanes.

US-36 at Wadsworth Boulevard: interchange reconstruction.

Regional highway projects in the Fiscally Constrained RTP using locally-derived funds include:

New interchange at I-25 North Meadows Drive in Castle Rock, Douglas County.

E-470 from I-25 to I-25: widen to eight/six lanes; build five new interchanges.

New interchange at C-470/Alameda.

New I-70 interchanges at Central Park Boulevard and Harvest Mile Road.

Peña Boulevard from I-70 to DIA: widen to six lanes.

21

Proposed 2008 – Cycle 2 amendments to the Fiscally Constrained 2035 RTP roadway projects are:

Jordon Road from Bradbury Ranch Parkway to Hess Road: widen from two to four lanes.

Change Broadway at I-25: interchange ramp modifications

Change I-225 from 2nd Avenue to Mississippi Avenue: widen from four to six lanes to 2015

staging.

I-25 from SH-52 to SH-66: widen roadway to six lanes.

The 2015 rail rapid transit network includes the existing Central, Southwest, and Central Platte

Valley rail lines, and the Southeast light rail line which opened in 2006. It also includes the I-25

HOV/Tolled Express Lanes, which also opened in 2006, as well as the existing

Broadway/Lincoln bus lanes and the existing Santa Fe high occupancy vehicle lanes. The

2015 rail rapid transit network includes all of the rapid transit corridor lines that were approved

by voters in RTD’s FasTracks plan on November 2, 2004. There are no specific differences in

the rail rapid transit network between the 2015, 2020, 2030 and 2035 staging years. The

differences are in the demographic and employment information that constitute the inputs to

the travel demand model.

Proposed 2008 Cycle 2 amendments to the Fiscally Constrained 2035 RTP transit projects are:

Modify final number of parking spaces at three RTD park-n-Ride lots (Airport/40th Avenue,

Broomfield, Federal Center).

Reflect closure of Franktown park-n-Ride lot.

To account for the DRCOG region’s expansion into Southwest Weld County:

The modeled regional roadway system was expanded to include an additional 105 miles of

designated roadways (freeways, major regional arterials, and principal arterials).

Four carpool lots are included.

The regional travel model was used to perform the travel forecasting. A summary description

of the model is included in Appendix B. A more detailed description is documented in the

DRCOG Compass Transportation Model Documentation and in a metadata report. Additional

documentation is available on the assumptions and operation of the socio-economic model.

These reports and papers are available for inspection at the DRCOG offices. This model

includes a number of assumptions, which are supported by current regional experience.

22

One set of modeling assumptions concerns transit operating policies. The model assumes that

RTD will keep transit fares constant in current dollars. This is a logical assumption as RTD has

an adopted policy of increasing fares in line with increases in the Consumer Price Index.

Modeled fares for proposed new services are based on the most similar existing services. The

model assumes that RTD would continue with its current approach in setting service levels for

various areas of the region. RTD last increased its fares on January 1, 2008 and is scheduled

to increase fares in January 2009.

The model assumes that the Northwest Parkway Authority and the E-470 Authority will

continue to charge tolls on their facilities on a per-mile cost basis in constant dollars similar to

current charges (16 cents per mile in 1996 dollars).

Parking costs in downtown Denver were varied using the Denver parking cost model, which

uses employment density and estimates of parking supply as variables. Parking costs were

established outside the Denver Central Business District by surveying current parking costs for

work and non-work trips, and assuming that these would remain constant over time.

Air Quality Modeling Assumptions The APCD of the Colorado Department of Public Health and Environment generated the Mobile

6.2 air pollution estimates. The conformity analysis for the 2008 Cycle 2 conformity finding began

in August 2008 after identification by RTD, CDOT, and local governments of projects they would

be submitting for inclusion. The models and assumptions used by APCD in the 2035 conformity

analysis were consistent with the SIP modeling and analysis that led to development of the

Denver and Longmont SIPs for carbon monoxide. The technical support documentation for each

of these SIPs is available for information at http://apcd.state.co.us/document/techdocs.html.

23

http://apcd.state.co.us/document/techdocs.html

Control Measures

There are several actions or projects described or assumed in the SIPs that are federally

enforceable control measures. PM10 street maintenance actions are one such control measure.

PM10 Street Maintenance Actions DRCOG must demonstrate that future year estimates of PM10 emissions will be less than or

equal to the maintenance PM10 emissions budgets to show conformity with the PM10 SIP. The

mobile source PM10 budgets are 54 tons per day (tpd) through 2021, and 55 tpd for 2022 and

beyond.

AQCC Regulation 16 is essential to the control of mobile source emissions. Adopted on August 15,

1991, the regulation has undergone several revisions, with the latest occurring on April 19, 2001.

Re-entrained road dust in the Denver metropolitan area from winter street sanding causes between

40 and 60 percent of PM10 emissions. It is the single largest contributor to PM10 emissions9.

Regulation 16 targets street sanding and sweeping practices.

Since October 1, 1991, street sanding material providers have been required to meet set

standards for the sanding materials they provide to state, city and county governments. The

regulation applies to both new and recycled sanding materials. All materials must meet

requirements regulating their angularity, percent fines and degree of durability. The burden of

material testing to meet these standards falls on the private companies supplying the materials.

An independent laboratory must conduct all testing.

Reductions in the applied amount of sanding material are also set for all of the local governments

and street maintaining agencies (CDOT, RTD, E-470 Authority, Northwest Parkway Authority)

within the nonattainment area. A reduction of 30 percent from their established baseline amount is

mandated. Baseline amounts are typically based on 1989 practices. In the defined “foothills” area,

9 In June 1998, the Colorado Department of Transportation, with technical assistance of Midwest Research Institute, concluded a study of the role of sand in PM10 emissions. Findings from this study demonstrated that the percentage of the total PM10 emissions from road traffic that consist of road dust increases from about 50 percent to as much as 80 or 90 percent during the high impact 24-hour period following road sanding. Previously, the PM10 emissions analysis had been using a sand share of 33.8 percent or about half of the recent study findings. Increasing the role of sand in producing PM10 emission increases the benefits of reduced street sanding. Over the past few years, local governments, CDOT, RTD and the E-470 Public Highway Authority have made major strides to reduce PM10 emissions from street sand by reducing the amount of sand spread on the streets during snow storms by about 40 percent from 1989 street sanding levels and increasing the sweeping of sanded streets within four days of each snow storm from none to 40 percent.

24

a 20 percent reduction from the established baseline is mandated. In addition to the above

requirements, the City and County of Denver and CDOT are required to reduce PM10 emissions

by:

72 percent within the Denver central business district.

50 percent within an area bounded by Federal Boulevard, Downing Street, 38th Avenue, and

Louisiana Avenue.

Records and reports of the reductions and practices used must be submitted yearly to the APCD

and the RAQC.

Finally, Regulation 16 sets rules for street sweeping to achieve reductions in PM10 emissions.

These rules include time requirements for sweeping after deployments of street sanding

materials, definition of the sweeping techniques to be used and targeted areas for increased

sweeping. Record keeping and reporting of dates, equipment use and areas swept are required

under these rules.

Preliminary Cycle 2 estimates of 2035 emissions indicated that PM10 emissions would be about

66.3 tpd after accounting for the impacts of Regulation 16. This is 11.3 tpd more than the 55 tpd

emissions budget. Because of this anticipated exceedance of the PM10 emissions budget, local

governments and road agencies were asked to provide commitments to further reduce emissions.

These commitments are for additional reductions in sand application and an increase in street

sweeping activities, above and beyond Regulation 16, to further reduce mobile source PM10

emissions. Thirty one local governments and agencies have committed to additional street

sanding and sweeping measures beyond Regulation 16. Actions that can be employed to

achieve PM10 reductions include:

Reducing the total amount of sanding materials used.

Using anti-icers, deicers, and other sand substitutes in place of sanding materials.

Street sweeping within four days of each snow event.

The local governments and agencies decide on the combination of the above actions they will

employ to meet their commitments.

25

The street sanding and sweeping commitments made by local governments, CDOT, and E-470

are detailed in Appendix C. The mobile source PM10 emissions analysis shows emission levels

of 42.53 tpd in 2035. This is less than the mobile source PM10 emission budget of 55 tpd.

The Fiscally Constrained 2035 RTP reserves approximately $90 million over a 28-year period in

CMAQ and local match funds for air quality programs and purchases. Some of this $90 million

will fund additional sweeper and deicer equipment.

The PM10 maintenance plan also identifies a test whereby the region must demonstrate that

transportation construction emissions do not exceed those assumed in the emissions budgets.

The budgets were established on the assumption that all of the facilities in the Fiscally

Constrained 2020 RTP, the RTP in effect at the time the PM10 SIP was adopted, would be

constructed at rates of 11.4 lane-miles per year for freeways and 62.7 lane-miles per year for

major regional and principal arterials. To pass the test, the rate of lane-mile construction

proposed in the Fiscally Constrained 2035 RTP must be less than or equal to the rate of

construction in the Fiscally Constrained 2020 RTP. The rate of construction for the Fiscally

Constrained 2035 RTP is 6.6 lane-miles per year for freeways and 42.1 lane-miles per year for

major regional arterials and principal arterials. Thus, the construction emissions of the Fiscally

Constrained 2035 RTP are less than the construction emissions assumed in the budgets and

the test is passed.

Mobile Source Measures

The regional emissions analysis does not reflect the air quality benefits of such travel demand

management programs as DRCOG’s RideArrangers Program, Teleworking, EcoPass, and other

transportation demand management actions. In addition, other programs whose benefits are

more difficult to ascertain are not fully incorporated into the model. Examples of such programs

include compressed workweeks and programs initiated after 1998.

The model does include emissions reduction benefits created by the regional Traffic Signal

System Improvement Program (TSSIP), which is a program in the TIP. The goal of this

program is to ensure that the region’s traffic signals operate in a safe manner that makes the

most efficient use of arterial street capacity. The efficiency objectives include:

Minimizing vehicle stops.

Minimizing travel delay.

26

Minimizing disruption caused by malfunctioning equipment.

The major components of the TSSIP include:

A capital improvement program that provides intersection control equipment and installs

communications links to allow signals to operate as a system.

A program to retime signals in a coordinated fashion to improve corridor travel time through

accomplishment of the above objectives.

In 2002, speed-and-delay runs were conducted on corridors in the region. The speeds in the

model were then adjusted to match the speeds that were observed in the speed-and-delay runs.

Consequently, the TSSIP, and its benefits to air quality, is reflected in the model.

Emission Test Results

The results of the emissions tests are reported in Table 4. The emissions estimates were

generated by APCD using the latest demographic forecasts, transportation inputs, and

emissions models. The test results do not indicate any failures in the horizon years of the

program or plan that would lead to a finding of non-conformity.

A qualitative test is required for years prior to 2013 in Denver for carbon monoxide. The

regional emissions analysis was completed for 2005 and is 1,517 tpd, which is less than the CO

SIP estimate of 1,614 tpd in 2006. The 2015 carbon monoxide estimate is 1,260.7 tpd, which is

below the budget. The carbon monoxide emissions for years prior to 2013 should then be equal

to or lower than the 1,600 tpd that applies to later years. No other factors (such as stationary

sources) are expected to cause a violation.

Qualitative assessments for years prior to 2015 are required for PM10. The region should not

violate the federal air quality standard as the region is currently at about 67 percent of the

federal health standard, and the 2015 estimate for direct PM10 is 32.8 tpd and 50.5 tpd for NOx

associated with PM10. Because both of these estimates are below the 54 tpd direct PM10 and

70 tpd NOx budgets, no violation is expected in years prior to 2015. Interpolation is not needed

under federal regulations as quantitative analyses were completed for 2015.

The Denver region was below all of the standards listed in Table 1. As noted above, the Denver

region is still demonstrating conformity with the 1-hour ozone standard. On November 20, 2007, the

27

Denver region was designated as nonattainment for the 8-hour ozone standard. Because of this

nonattainment designation, the region will have to prepare an ozone 8-hour attainment SIP.

Conformity to the 1-hour ozone standard will continue to apply as one of the “interim” ozone tests

until 8-hour ozone emissions budgets are established and found adequate by the EPA. After that,

the region would have to demonstrate conformity to the 8-hour budgets and will cease examination

of emissions compared to the 1-hour budgets.

28

Table 4 2008 Cycle 2 Conformity Emissions Test Results

Result<Budget Pollutant and Area Test

(tons per day) Pass/Fail

Carbon Monoxide in Denver Attainment Maintenance

Area

2013 Staging ≤ Budget10

2015 Staging ≤ Budget




Fiscally Constrained 2035 RTP ≤ Budget

1,311.6 < 1,625

1,260.7 < 1,625

1,202.5 < 1,625

1,209.7 < 1,600

1,274.5 < 1,600

1,374.8 < 1,600

Pass

Pass

Pass

Pass

Pass

Pass

Carbon Monoxide in Longmont Attainment

Maintenance Area






37.1 < 43

33.1 < 43

31.8 < 43

34.9 < 43

38.2 < 43

Pass

Pass

Pass

Pass

Pass

PM10






32.8 < 54

35.5 < 54

35.9 < 55

37.6 < 55

42.5 < 55

Pass

Pass

Pass

Pass

Pass

NOx associated with PM10






50.5 < 70

39.1 < 70

37.6 < 56

31.7 < 56

32.3 < 56

Pass

Pass

Pass

Pass

Pass

Ozone VOC in 1-Hour Ozone Attainment Maintenance Area







87.2 < 119

58.1 < 119

52.5 < 119

45.5 < 119

40.5 < 119

40.5 < 119

Pass

Pass

Pass

Pass

Pass

Pass

NOx in 1-Hour Ozone Attainment Maintenance Area







118.3 < 134

62.5 < 134

50.7 < 134

40.2 < 134

32.7 < 134

26.0 < 134

Pass

Pass

Pass

Pass

Pass

Pass

10 2013 derived from interpolation of 2005 estimate of 1,517.0 tpd calculated and 2015 estimate of 1,260.7 tpd. 11 2021 derived from interpolation of 2020 estimate of 1,202.5 tpd calculated and 2030 estimate of 1,274.5 tpd. 12 2010 derived from interpolation of 2005 estimate of 44.4 tpd calculated and 2015 estimate of 33.1 tpd. 13 2022 derived from interpolation of 2020 estimate of 35.46 tpd calculated and 2030 estimate of 37.62 tpd. 14 2022 derived from interpolation of 2020 estimate of 39.1 tpd calculated and 2030 estimate of 31.7 tpd. 15 2006 derived from interpolation of 2005 estimate of 92.4 tpd and 2015 estimate of 52.5 tpd. 16 2013 derived from interpolation of 2005 estimate of 92.4 tpd and 2015 estimate of 52.5 tpd. 17 2006 derived from interpolation of 2005 estimate of 127.9 tpd and 2015 estimate of 50.7 tpd. 18 2013 derived from interpolation of 2005 estimate of 127.9 tpd and 2015 estimate of 50.7 tpd.

29

APPENDIX A TRANSPORTATION NETWORK ASSUMPTIONS

34

35


TIP-IDCOG-ID Before AfterImprovement ClassificationFacility Name Start At End At

Through Lanes

Staging: 2010 Fiscally Constrained

Model Network Change Included in the Air Quality Conformity Assessmentfor the Fiscally Constrained 2035 RTP and the 2008-2013 TIP

By 2035 RTP Staging PeriodsOct 30, 2008

0 2New Road CollectorYale Ave Cherry Creek Wabash StApCo-2001-09

2 6Add through lane(s) PrincipalQuincy Ave Reservoir Rd Plains PkwyApCo-2004-03

0 4New Road CollectorChenango/Cooperleaf Picadilly QuincyApCo-2005-05

4 6Add through lane(s) PrincipalSmoky Hill Road Gun Club Rd. Versaille PkwyApCo-2008-02

6 6Grade Separation PrincipalWadsworth Bypass 55th Avenue Ralston RoadArvd-2002-05 2003-003

2 4Add through lane(s) Principal86th Parkway Jellision St 88th AveArvd-2007-01

2 4Add through lane(s) PrincipalW. 88th Avenue 86th Pkwy Independence WayArvd-2007-01

2 4New Road MinorGartell Road County Line Rd Inspiration DriveAura-1998-19

4 6New Road PrincipalArapahoe Road Liverpool Smoky Hill RoadAura-1998-24

2 6Add through lane(s) PrincipalSmoky Hill Road E-470 Glasglow DrAura-2001-12

0 2New Road PrincipalSheridan Pkwy Northwest Pkwy SH 7Brfd-2004-08

0 2New Road PrincipalBuckley Road 136th Avenue Bromley LaneBrgh-2004-01

0 6New Road MinorPrairie Center Parkway 144th Avenue Tower RoadBrgh-2005-11

2 4Add through lane(s) CollectorTower Road Prairie Center Pkwy Bromley LaneBrgh-2005-12

0 2New Road CollectorTower Road Prairie Center Pkwy Bromley LaneBrgh-2005-12

0 2New Road CollectorTelluride Street Bromley Lane Prairie Center PkwyBrgh-2005-13

2 4Add through lane(s) PrincipalSheridan Parkway Aspen Creek Drive 144th AvenueBrmf-2003-13

2 4Add through lane(s) MinorEast Midway Boulevard Lowell Boulevard 3000 feet east of LowelBrmf-2003-17

6 8Add through lane(s) FreewayI-25 Lincoln Ave C-470 South RampsCDT1-1998-05 1999-001

Page 1 of 39Oct 30, 2008


Through Lanes




2 2Bridge PrincipalUS 36 North St Vrain Creek (CDT4-1996-08 1997-009

4 6Add through lane(s) FreewayI- 25 SH-52 SH-66CDT4-2008-05

6 6Add Ramp(s) RampI-25 I-25 SB SH-270 EBCDT6-1995-64 1995-332b

4 4Grade Separation RampI-270 I-270 EB I-76 EBCDT6-1995-64 1995-332b

4 4Grade Separation FreewayI-270 I-25CDT6-1995-64 1995-332b

0 1Add Ramp(s) RampI-70 I-70 EB SH-58 WBCDT6-1998-05 1999-008

3 3Grade Separation FreewayI-70 SH-58CDT6-1998-05 1999-008

0 1Add Ramp(s) RampSH-58 SH-58 EB I-70 WBCDT6-1998-05 1999-008

4 6Bridge Principal120th Avenue I-25 west ramps I-25 east rampsCDT6-2001-01 2001-156

5 6Add through lane(s) PrincipalFederal Blvd Alameda Avenue 6th AvenueDenv-1996-01 2001-169

4 6Add through lane(s) FreewayPena Boulevard 78th/75th Ave ramps Jackson Gap St west rDenv-1997-01

6 8Add through lane(s) FreewayPena Boulevard E-470 east ramps 78th/75th Ave rampsDenv-1997-01

Interchange Reconstruction FreewayI-25 (see diagram) 17th Ave (see diagram) 23rd AveDenv-2001-06 2001-235

0 4New Road PrincipalCentral Park Blvd Martin Luther King Blvd 36th AveDenv-2001-07

0 4New Road MinorMartin Luther King Blvd Central Park Blvd Fulton StDenv-2001-11

0 4New Road MinorMartin Luther King Blvd Iola Street Peoria StreetDenv-2001-13

0 4New Road MinorMartin Luther King Blvd Fulton St Iola Street.Denv-2001-13

2 4Add through lane(s) PrincipalTower Road 38th Ave. 48th AveDenv-2001-16

0 2New Road CollectorMaxwell Place Chambers Rd Memphis StreetDenv-2001-19

Page 2 of 39Oct 30, 2008


Through Lanes




3 4Add through lane(s) Minor 78th Avenue Gun Club Rd Employee ParkingDenv-2003-18

4 6Add through lane(s) PrincipalQuebec St 53rd Ave 56th AveDenv-2004-08

0 4New Road Minor 38th Avenue Himalaya PicadillyDenv-2005-02

0 4New Road Collector35th Ave Syracuse Central Park BoulevardDenv-2005-14

0 2New Road Collector35th Ave Central Park Boulevard Akron St.Denv-2005-14

0 2New Road Collector35th Ave Akron St. Havana St.Denv-2005-14

2 4Add through lane(s) MinorHavana Street Smith Road 40th AveDenv-2005-18

0 4New Road MinorHavana Street Florence Way MLK BlvdDenv-2005-19

0 2New Road MinorHavana Street (SB) MLK Blvd 26th AvenueDenv-2005-19

2 2Reduce Lanes MinorIola Street (NB) 26th Avenue MLK BlvdDenv-2005-19

4 4Highway Operational PrincipalQuebec St. 49th/47th Underway 53rdDenv-2006-24

2 4Add through lane(s) CollectorTown Center Drive Santa Fe Drive Cactus BluffDgCo-1998-07

2 4Add through lane(s) CollectorTown Center Drive Cactus Bluff Lucent BlvdDgCo-1998-07

2 2Grade Separation FreewayE-470 Jordan RdE470-2001-05

1 2Ramp widening RampE-470 Ramp E-470 WB Jordan RdE470-2001-05

1 2Ramp widening RampE-470 Ramp Jordan Rd EB-E-470E470-2001-05

2 2Grade Separation FreewayE-470 Jewell AveE470-2006-01

1 2Ramp Widening RampE-470 Ramp E-470 NB Jewell AvenueE470-2006-01

1 2Ramp Widening RampE-470 Ramp E-470 SB Jewell AvenueE470-2006-01

2 4Add through lane(s) CollectorPeakview Ave/Dayton Boston Street Dayton StreetGrnV-2006-01

Page 3 of 39Oct 30, 2008


Through Lanes




0 4New Road MinorYale Avenue Rooney Rd Bear Creek BlvdLakw-1995-08

0 4New Road MinorMcIntyre Street Alameda Ave. Morrison RdLakw-1995-09

0 2New Road CollectorSky Ridge Parkway Ridgegate Parkway Park Meadows Blvd.Ltre-2007-02

2 4Add through lane(s) Principal136th Avenue Zuni St Huron StreetMV20-2020-009

2 4Add through lane(s) Principal144th Avenue York St Colorado BlvdMV20-2020-013

2 6Add through lane(s) PrincipalBromley Lane Sable Boulevard Chambers RoadMV20-2020-047

2 4Add through lane(s) PrincipalEast County Line Road 3rd Avenue Ute RoadMV20-2020-065

0 2New Road MinorPlum Creek Parkway Gilbert Street Ridge RoadMV20-2020-152

2 2Reconstruction PrincipalRidge Road Plum Creek Parkway SH-86MV20-2020-163

2 4Add through lane(s) PrincipalTower Road 48th Ave 56nd AveMV20-2020-183

2 4Add through lane(s) PrincipalWashington Street 136th Avenuee 144th AvenueMV20-2020-204

2 4Add through lane(s) Principal56th Avenue Quebec Central Park BoulevardMV30-2030-030 2007-082

5 6Add through lane(s) PrincipalColfax Avenue Peoria St Potomac StMV30-2030-107

4 6Add through lane(s) PrincipalColfax Avenue Potomac St Airport BlvdMV30-2030-109

2 4Add through lane(s) Principal104th Avenue Croke Dr. City limitsNort-2003-03

0 2New Road PrincipalChambers Road Mainstreet Lincoln AvenuePark-2003-08

2 4Add through lane(s) PrincipalMainstreet Chambers Rd Bradbury Ranch DrPark-2004-01

0 1Add Ramp(s) RampE-470 Gun Club Rd E-470 NBRTP -2001-228

4 4Grade Separation FreewayE-470 I-70RTP -2001-228

Page 4 of 39Oct 30, 2008


Through Lanes




0 1Add Ramp(s) RampE-470 E-470 NB Gun Club RdRTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 NB I-70 WBRTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 SB Gun Club RdRTP -2001-228

0 2New Road CollectorRelocated Colfax Ave Picadilly Rd Powhaton RdRTP -2001-228

3 4Add through lane(s) Principal 72nd Avenue Sheridan Boulevard .25 mi. e/o Sheridan BlRTP -2001-58

4 6Add through lane(s) Principal Sheridan Blvd 70th Ave. 74th Ave.RTP -2001-58

2 4Add through lane(s) CollectorHolly St. 138th Ave 140th AveThor-2001-30

2 4Add through lane(s) Principal120th Avenue Holly Street east Quebec StreetThor-2002-01 2003-039

2 4Add through lane(s) Principal144th Avenue Washington St. York St.Thor-2006-06

2 4Add through lane(s) CollectorHolly Street 123rd Ave. 128th Ave.Thor-2006-09

2 4Add through lane(s) Principal88th Ave Dahia St 300ft eastThor-2006-19

2 6Add through lane(s) MinorWashington Street 164th Ave. SH-7Thor-2006-22

2 4Add through lane(s) MinorWashington Street 160th Ave. 164th AveThor-2006-22

2 4Bridge Freeway128th Ave West approach east approachThor-2006-25 2007-147

0 2Grade Separation CollectorCabela Interchange SH-58 Cabela Dr.WhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange SH-58 WB Cabela DrWhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange Cabela Dr. SH-58 WBWhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange SH-58 EB Cabela Dr.WhRd-2006-02

0 1Add Ramp(s) RampCabela Interchange Cabela Dr. SH-58 EBWhRd-2006-02

0 0park-n-RidePicadilly/Smoky Hill Rd Smoky Hill Rd.RTD -1996-18

Page 5 of 39Oct 30, 2008


Through Lanes




0 0Transit Passenger FacilitiesFasTracks CMAQ Proj US-36RTD -2005-03 2007-044

park-n-Ride Park-N-RideUS-36 park-n-Ride Reed Street Near 104th AvenueRTD -2006-09

park-n-Ride Park-N-RideI-25 LRT station BroadwayRTD -2006-10

Transit Passenger Facilities StationAlameda Avenue Sable BlvdRTD-2004-03 2005-067

Page 6 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) PrincipalPecos Street 52nd Avenue I-76AdCo-1995-05

2 4Add through lane(s) PrincipalWashington Street 58th Avenue SH-224AdCo-1998-01

Grade Separation PrincipalPecos Street 60th AvenueAdCo-2005-02 2005-099

0 2Add Ramp(s) RampArapahoe Rd EB Arapahoe Rd NB Parker RdApCo-2003-04 2005-044

0 1Add Ramp(s) RampArapahoe Rd WB Arapahoe Rd NB Parker RdApCo-2003-04 2005-044

0 2Add Ramp(s) RampArapahoe Rd EB Arapahoe Rd SB Parker RdApCo-2003-04 2005-044

New Interchange Major RegionalParker Road Arapahoe RoadApCo-2003-04 2005-044

2 6Add through lane(s) PrincipalGun Club Road Quincy Ave 1.5 Miles SouthApCo-2003-23

2 6Add through lane(s) PrincipalQuincy Ave Plains Pkwy Gun Club RdApCo-2004-03

2 4Grade Separation Minor80th Avenue UPRRArvd-1995-03

2 4Add through lane(s) Minor80th Avenue Alkire Street Kipling StreetArvd-1995-03

4 6Add through lane(s) PrincipalTower Road Smith Rd I-70Aura-1989-01

2 6Add through lane(s) Principal 6th Avenue Airport Blvd Tower RdAura-1996-08

2 6Add through lane(s) PrincipalJewell Avenue Gun Club Rd Harvest Rd.Aura-1996-14

0 2New Road Principal 6th Parkway SH-30 E-470Aura-1997-01

0 2New Road PrincipalTower Road 6th Avenue Colfax AvenueAura-1998-13

2 4Add through lane(s) CollectorMississippi Avenue Gun Club Road Harvest RdAura-1998-16

0 2New Road MinorHarvest Mile Road 56th Avenue DIA boundary line/64thAura-1998-17

0 4New Road MinorGun Club Road Mississippi Avenue SH-30Aura-1998-22

Page 7 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) Principal6th Avenue/SH30 Tower Rd 6th PkwyAura-2004-06

2 6Add through lane(s) Principal 6th Avenue E-470 Gun Club RdAura-2004-08

2 6Add through lane(s) PrincipalPicadilly Rd 6th Ave Colfax AveAura-2004-09

0 6New Road PrincipalPicadilly Rd 48th Ave 56th AvenueAura-2004-11

0 6New Road PrincipalPicadilly Rd Colfax Ave I-70Aura-2004-13

0 2New Road CollectorInspiration Drive Picadilly Section Line 1/4 mile west of HarvesAura-2005-01

0 4New Road CollectorCounty Line Road Monaghan Section line Hayesmount RoadAura-2005-02

0 2New Road CollectorMonaghan Road County Line Dry CreekAura-2005-03

0 4New Road Minor 38th Avenue Himalaya PicadillyAura-2005-06

2 6Add through lane(s) Principal 56th Ave Picadilly Rd E-470Aura-2006-01

2 4Add through lane(s) PrincipalArapahoe Rd CherryVale Rd Votec EntranceBlCo-2004-01

2 4Add through lane(s) Principal144th Avenue Sheridan Blvd Zuni StreetBrfd-1995-11

2 4New Road PrincipalSouth Boulder Rd/160t Boulder/Broomfield Co. Lowell BlvdBrfd-2000-20

2 4Add through lane(s) PrincipalSimms Street 108th Ave 112th AveBrfd-2001-10

2 4Add through lane(s) PrincipalSheridan Blvd Lowell Boulevard NW ParkwayBrfd-2004-01

1 1Add Ramp(s) RampI-25 NB Off-Ramp I-25 NB SH-7Brfd-2004-03

1 1Add Ramp(s) RampI-25 SB Off-Ramp I-25 SB SH-7Brfd-2004-03

2 4Add through lane(s) FreewaySH-7 West I-25 Ramps East I-25 RampsBrfd-2004-03

1 1Add Ramp(s) RampSH-7 EB Loop Ramp SH-7 I-25 NBBrfd-2004-03

Page 8 of 39Oct 30, 2008


Through Lanes




0 1Add Ramp(s) RampSH-7 EB On-Ramp SH-7 I-25 SBBrfd-2004-03

0 1Add Ramp(s) RampSH-7 WB Loop Ramp SH-7 I-25 SBBrfd-2004-03

1 1Add Ramp(s) RampSH-7 WB On-Ramp SH-7 I-25 NBBrfd-2004-03

2 6Add through lane(s) PrincipalSH-7 Sheridan Pkwy I-25Brfd-2004-06

2 6Add through lane(s) PrincipalSheridan Pkwy Northwest Pkwy SH-7Brfd-2004-08

4 6Add through lane(s) PrincipalBromley Lane Hwy 85 Sable BlvdBrgh-2003-08

0 4New Road CollectorTower Road Bridge Street Bromley LaneBrgh-2003-09

0 2New Road CollectorHoyt Street Midway Boulevard Industrial LaneBrmf-2003-09

2 4Add through lane(s) Principal144th Avenue US-287 Sheridan BlvdBrmf-2005-01

2 4Add through lane(s) MinorLowell Boulevard 120th Avenue 128th AvenueBrmf-2005-03

2 4Add through lane(s) MinorLowell Boulevard 128th Avenue 136th AvenueBrmf-2005-10

0 4Bridge Minor112th Avenue Old Wadsworth Over US-36 to 112th ABrmf-2005-11

0 2New Road CollectorParkland Street Wadsworth Blvd Uptown AvenueBrmf-2005-34

2 4Add through lane(s) PrincipalSH- 7 Boulder County Line Sheridan ParkwayBrmf-2006-01

0 4New Road CollectorAllison St 120th Avenue Commerce StreetBrmf-2006-02

0 2New Road MinorFrontage Road (East of Castle Pines Interchan Ridgegate ParkwayCDT1-1998-05 1999-001

6 6Intelligent Transportation Sys FreewayI-25 Plum Creek PkwyCDT1-1998-05 1999-001

6 8Add through lane(s) FreewayI-25 Lincoln Ave C-470 South RampsCDT1-1998-05 1999-001

6 8Add through lane(s) FreewayI-25 Ridgegate Parkway Lincoln AvenueCDT1-1998-05 1999-001

Page 9 of 39Oct 30, 2008


Through Lanes




4 6Add through lane(s) FreewayI-25 5th Street Meadows/Founders PaCDT1-1998-05 1999-001

6 6Interchange Reconstruction FreewayI-25 Plum Creek PkwyCDT1-1998-05 1999-001

6 6Interchange Reconstruction FreewayI-25 Plum Creek PkwyCDT1-1998-05 1999-001

8 10Add through lane(s) FreewayI-25 Lincoln Ave C-470 South RampCDT1-1998-05 1999-001

4 6Add through lane(s) FreewayI-25 Douglas Lane 5th StreetCDT1-1998-05 1999-001

6 8Add through lane(s) FreewayI-25 Meadows/Founders Pa Ridgegate ParkwayCDT1-1998-05 1999-001

4 4Add through lane(s) Major RegionalUS 85 Highlands Ranch Park Titan RoadCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS 85 Titan Road Cook RanchCDT1-2001-02 2001-154

4 4Add through lane(s) Major RegionalUS 85 C-470 Highlands Ranch PkwyCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS 85 SH-67 (Sedelia) Daniels ParkCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 Titan Rd LouviersCDT1-2001-02 2001-154

4 4Add through lane(s) Major RegionalUS- 85 Highlands Ranch Pkwy Titan RdCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 CDOT MP 192.2 .5 mi west of SH-67CDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 .5 mi east of SH-67 Meadows PkwyCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS 85 (Sedalia Interse MP 191.75 SH 67 (Sedelia)CDT1-2001-02 2001-154

0 1Add Ramp(s) RampUS 285 US 285 NB Shaffers CrossingCDT1-2004-08

3 4Grade Separation Major RegionalUS 285 Shaffers CrossingCDT1-2004-08

0 1Add Ramp(s) RampUS 285 Shaffers Crossing US 285 NBCDT1-2004-08

0 1Add Ramp(s) RampUS 285 Shaffers Crossing US 285 SBCDT1-2004-08

0 1Add Ramp(s) RampUS 285 US 285 SB Shaffers CrossingCDT1-2004-08

0 1Add Ramp(s) RampUS 285 US 285 SB Richmond Hill RoadCDT1-2004-10

Page 10 of 39Oct 30, 2008


Through Lanes




0 1Add Ramp(s) RampUS 285 US 285 NB Richmond Hill RoadCDT1-2004-10

0 1Add Ramp(s) RampUS 285 Richmond Hill Road US 285 SBCDT1-2004-10

0 1Add Ramp(s) RampUS 285 Richmond Hill Road US 285 NBCDT1-2004-10

2 4Add through lane(s) Major RegionalUS 285 Richmond Hill Road Foxton RoadCDT1-2004-10

2 4Grade Separation Major RegionalUS 285 US 285 Richmond Hill RoadCDT1-2004-10

2 4Add through lane(s) PrincipalSH 66 Hover Road US 287 (Longmont)CDT4-1998-04 1999-026

4 4Interchange Reconstruction FreewayUS-36 McCaslin BlvdCDT4-2007-03

4 6Add through lane(s) FreewayI-225 North Ramps of Alame 6th AveCDT6-1998-04 1999-006

4 6Add through lane(s) FreewayI-225 North Ramps of Missis North Ramps of AlameCDT6-1998-04 1999-006

8 8Interchange Reconstruction FreewayUS-6 Federal BlvdCDT6-2004-28

4 6Add through lane(s) Major RegionalSanta Fe Drive C-470 south ramps C-470 north rampsCDT6-2004-43

2 4Add through lane(s) MinorPrairie Hawk Drive Meadows Pkwy. Wolfensberger Rd.CRck-1995-01

0 4New Road CollectorWoodlands Blvd. Dales Pony Circle Scott Blvd.CRck-1995-04

4 6Add through lane(s) FreewayPena Boulevard Tower Road E-470 east rampsDenv-1997-01

2 4Add through lane(s) PrincipalWashington Street Elk Place 52nd AvenueDenv-1998-02

4 6Add through lane(s) FreewayPena Blvd I-70 Tower RdDenv-1999-01

0 4New Road CollectorAirport Way 48th Ave 56th AveDenv-2001-22

0 1Add Ramp(s) RampHavana St Hanana St I-70 WBDenv-2002-49 2007-083

0 1Add Ramp(s) RampHavana St Hanana St I-70 EBDenv-2002-49 2007-083

0 1Add Ramp(s) RampI-270 I-270 SB Central Park BlvdDenv-2002-49 2007-083

Page 11 of 39Oct 30, 2008


Through Lanes




2 2Add Ramp(s) RampI-270 I-270 SB I-70 EBDenv-2002-49 2007-083

2 2Add Ramp(s) RampI-70 I-70 WB I-270 NBDenv-2002-49 2007-083

Grade Separation MinorI-70 Central Park BlvdDenv-2002-49 2007-083

Grade Separation MinorI-70 Havana StDenv-2002-49 2007-083

0 1Add Ramp(s) RampI-70 I-70 EB Central Park BlvdDenv-2002-49 2007-083

0 1Add Ramp(s) RampI-70 I-70 WB Hanana StDenv-2002-49 2007-083

0 4New Road MinorNorth I-70 Frontage Rd Havana St Central Park BlvdDenv-2002-49 2007-083

0 4New Road MinorSouth I-70 Frontage R Central Park Blvd Havana StDenv-2002-49 2007-083

4 6Add through lane(s) PrincipalEvans Avenue Colorado Blvd I-25Denv-2004-03

2 4Add through lane(s) Principal56th Avenue Himalaya St Picadilly RdDenv-2004-04

0 4New Road PrincipalCentral Park Blvd 49th Ave 56th AveDenv-2005-04

0 6New Road PrincipalCentral Park Blvd. 36th Ave Smith RoadDenv-2005-15

0 6New Road PrincipalCentral Park Blvd Smith Road 49th AveDenv-2005-16

6 8Add through lane(s)Broadway Mississippi KentuckyDenv-2005-24

6 6Interchange Reconstruction PrincipalBroadway Kentucky Exposition AveDenv-2005-24

6 8Add through lane(s) PrincipalBroadway Mississippi Ave Kentucky AveDenv-2005-24

6 6Add through lane(s) PrincipalBroadway Kentucky Ave ExpositionDenv-2005-24

0 1Add Ramp(s) RampI-25 BroadwayDenv-2005-24

0 6New Road Minor71st Avenue Telluride St Tower RdDenv-2006-12

0 2New Road Minor71st Avenue Tower Rd Dunkirk StDenv-2006-12

Page 12 of 39Oct 30, 2008


Through Lanes




0 4New Road CollectorHighpointe Blvd Dunkirk St Tower RdDenv-2006-13

0 4New Road MinorTelluride St 40th Ave 71st AveDenv-2006-14

0 2New Road CollectorArgonne St 56th Ave 71st AveDenv-2006-16

0 4New Road MinorDunkirk St 56th Ave 64th AveDenv-2006-17

0 4New Road Collector45th Avenue Tower Rd Chambers RdDenv-2006-18

0 4New Road MinorHavana Street/Iola Stre Florence Way Smith RoadDenv-2006-23

4 6Add through lane(s) PrincipalQuebec St. 49th/47th Underway 53rdDenv-2006-24

0 2New Road MinorDallas Street 51st 56thDenv-2006-25

0 4New Road CollectorTelluride Street 40th Ave 71st AveDenv-2007-02

0 4New Road Collector60th Avenue Tower Rd Telluride StDenv-2007-03

0 4New Road Principal64th Avenue Dunkirk Rd Pena BlvdDenv-2007-04

0 4New Road Collector67th Avenue Tower Rd Telluride StDenv-2007-05

0 4New Road CollectorYampa Street 40th Ave 72nd AveDenv-2007-06

2 4Add through lane(s) MinorWewatta Street Speer Blvd 23rd St / Park AveDenv-2007-08

5 6Add through lane(s) PrincipalFederal Blvd Alameda Ave 6th AveDenv-2008-01

4 6Add through lane(s) PrincipalLincoln Avenue 1st Street Keystone BlvdDgCo-1993-03

0 4New Road CollectorTown Center Drive Lucent Blvd Highlands Ranch PkwyDgCo-1998-07

0 1Add Ramp(s) RampDouglas Lane Douglas Lane I-25 NBDgCo-2000-02

0 1Add Ramp(s) RampDouglas Lane Douglas Lane I-25 SBDgCo-2000-02

Page 13 of 39Oct 30, 2008


Through Lanes




0 2Grade Separation MinorDouglas Lane West I-25 Frontage Rd East I-25 Frontage RdDgCo-2000-02

0 1Add Ramp(s) RampI-25 I-25 NB Douglas LaneDgCo-2000-02

0 1Add Ramp(s) RampI-25 I-25 SB Douglas LaneDgCo-2000-02

0 2New Road PrincipalHess Rd Newland Gulch Chambers RdDgCo-2000-10

0 2New Road PrincipalHess Rd Castle Pines Rd/Hess Newland GulchDgCo-2000-10

0 2New Road PrincipalHess Rd I-25 Castle Pine/Hess RoadDgCo-2000-10

2 4Add through lane(s) PrincipalHilltop Rd Canterberry Pkwy Singing Hills RdDgCo-2004-09

2 2Add through lane(s) PrincipalMonarch Blvd Castle Pines Pkwy Rocky Heights Middle sDgCo-2004-12

0 2New Road PrincipalChambers Rd Stroh Rd Hess RdDgCo-2006-03

0 4New Road PrincipalStroh Rd Chambers Rd Crowfoot Valley RdDgCo-2006-04

0 2New Road PrincipalCanyons Pkwy (Arterial Crowfoot Valley Rd Hess RdDgCo-2008-01

0 1Add Ramp(s) FreewayE-470 Potomac St E-470 NBE470-2005-02

0 1Add Ramp(s) FreewayE-470 E-470 NB Potomac StE470-2005-02

0 1Add Ramp(s) FreewayE-470 Potomac St E-470 SBE470-2005-02

0 1Add Ramp(s) FreewayE-470 E-470 SB Potomac StE470-2005-02

4 4Grade Separation FreewayE-470 PotomacE470-2005-02

2 4Add through lane(s) PrincipalLeon A. Wurl Pkwy US-287 119th St.Erie-1999-03

2 4Add through lane(s) MinorLeon A. Wurl Parkwy Coal Creek Weld CR 5Erie-2008-01

Interchange Reconstruction FreewayUS-36 BRT Table Mesa DrFsTr-2003-14

2 4Add through lane(s) PrincipalChatfield Avenue Garrison Street Wadsworth BlvdJfCo-2006-02

Page 14 of 39Oct 30, 2008


Through Lanes




0 2New Road PrincipalSouth Boulder Rd/160t 120th St Boulder/Broomfield CoLaf -2007-01

2 4Grade Separation PrincipalAlameda Avenue West C-470 Ramp East E-470 RampLakw-1995-07

0 1Add Ramp(s) RampAlameda Avenue Alameda Avenue SB C-470Lakw-1995-07

0 1Add Ramp(s) RampAlameda Avenue Alameda Avenue NB C-470Lakw-1995-07

0 1Add Ramp(s) RampC-470 NB C-470 Alameda AveLakw-1995-07

0 1Add Ramp(s) RampC-470 SB C-470 Alameda AveLakw-1995-07

4 6Add through lane(s) PrincipalWadsworth Blvd US-285 South. Ramps US-285 North rampsLakw-2007-08

3 4Add through lane(s) MinorDry Creek Rd Broadway Mineral AveLitl-2005-01

2 4Add through lane(s) PrincipalNelson Rd 75th St Affolter DrLong-2004-02

2 4Add through lane(s) Principal 17th Avenue Alpine St. East County Line RdLong-2004-03

0 2New Road CollectorMartin Street Ken Pratt Blvd/SH-119 1st AveLong-2005-03

2 4Add through lane(s) PrincipalRidgegate Pkwy Lincoln Ave I-25Ltre-2004-01

4 6Add through lane(s) PrincipalLincoln Avenue I-25 Peoria StreetLtre-2006-01

0 4New Road MinorSky Ridge Avenue Park Meadows Peoria StLtre-2007-01

New Road CollectorHavana St Lincoln Ave. RidgeGate ParkwayLtre-2007-03

4 6Add through lane(s) PrincipalLincoln Ave Peoria St 1st AveLtre-2007-05

2 4Add through lane(s) Minor 58th Avenue Washington Street York StreetMV20-2020-020

3 6Add through lane(s) Principal 6th Ave 6th Pkwy Harvest Mile RdMV20-2020-025

2 4Add through lane(s) PrincipalAlameda Avenue Bear Creek Boulevard McIntyre StMV20-2020-035

Page 15 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) PrincipalAlameda Avenue McIntyre St Rooney RdMV20-2020-035

0 2New Road PrincipalBayou Gulch/Chamber Parker Road Southern Boundary of MV20-2020-043

4 6Add through lane(s) PrincipalBromley Lane Chambers Road 27th/BuckleyMV20-2020-047

2 4Add through lane(s) PrincipalChambers Road Hess Road Newlin Gulch RoadMV20-2020-056

0 2New Road PrincipalChambers Road Newlin Gulch Blvd MainstreetMV20-2020-056

2 4Add through lane(s) PrincipalCrowfoot Valley Road Macanta Rd Chambers RdMV20-2020-059

2 6Add through lane(s) PrincipalJewell Avenue E-470 Gun Club RdMV20-2020-096

2 4Add through lane(s) PrincipalMainstreet Canterberry Pkwy Tomahawk RdMV20-2020-110

2 4Add through lane(s) PrincipalMeadows Parkway Coachline Road Meadows BlvdMV20-2020-114

2 4Add through lane(s) PrincipalPace Street 3rd Avenue Ute RoadMV20-2020-138

2 6New Road PrincipalPicadilly Road I-70 Smith RoadMV20-2020-146

2 4Add through lane(s) PrincipalQuincy Avenue Kipling Street Carr StreetMV20-2020-161

0 4New Road PrincipalMainstreet Peoria St Chambers RdMV20-2020-171

4 6Add through lane(s) PrincipalThornton Pkwy Grant Street Washington StreetMV20-2020-182

2 4Add through lane(s) PrincipalTower Road 56th Avenue Pena BoulevardMV20-2020-184

2 6Add through lane(s) PrincipalTower Road Colfax Avenue Smith RdMV20-2020-186

2 4Add through lane(s) PrincipalWashington Street 144th Avenue 152nd AveMV20-2020-205

6 8Add through lane(s) PrincipalWadsworth Blvd US-6 south ramps US-6 north rampsMV30-2030-004

0 6New Road Minor120th Ave Wadsworth Blvd Allison StMV30-2030-024

Page 16 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) Principal 48th Avenue Chambers Rd Tower RdMV30-2030-027

2 6Add through lane(s) Principal56th Avenue Central Park Boulevard Havana StreetMV30-2030-030 2007-082

2 6Add through lane(s) PrincipalGun Club Road Quincy Ave Yale AveMV30-2030-035

2 4Add through lane(s) PrincipalHampden Avenue Himalaya Rd Gun Club RdMV30-2030-037

2 4Add through lane(s) PrincipalHess Road Chambers Rd Motsenbocker RdMV30-2030-038

0 4New Road PrincipalHess Road Motsenbocker Rd Parker RdMV30-2030-038

2 4Add through lane(s) PrincipalQuincy Avenue Simms St Kipling PkwyMV30-2030-044

0 1Add Ramp(s) RampCastlegate NB On-Ra Castlegate Dr I-25 NBMV30-2030-059

0 1Add Ramp(s) RampCastlegate SB On-Ram Castlegate Dr I-25 SBMV30-2030-059

0 4Grade Separation MinorI-25 Castlegate DrMV30-2030-059

0 1Add Ramp(s) RampI-25 NB Off-Ramp I-25 NB Castlegate DrMV30-2030-059

0 1Add Ramp(s) RampI-25 SB Off-Ramp I-25 SB Castlegate DrMV30-2030-059

0 4New Road MinorNorth Meadows Dr. ext US-85 I-25MV30-2030-059

0 6New Road Principal 48th Avenue Picadilly Rd Powhaton RdMV30-2030-066

0 6New Road PrincipalHarvest Mile Road Jewell Ave I-70MV30-2030-075

0 4New Road PrincipalMainstreet/Ridgegate I-25 Peoria StMV30-2030-077

0 1Add Ramp(s) RampI-70 I-70 WB Picadilly RdMV30-2030-083

0 1Add Ramp(s) RampI-70 I-70 EB Picadilly RdMV30-2030-083

0 1Add Ramp(s) RampPicadilly Rd Picadilly Rd I-70 WBMV30-2030-083

0 1Add Ramp(s) RampPicadilly Rd Picadilly Rd I-70 EBMV30-2030-083

Page 17 of 39Oct 30, 2008


Through Lanes




0 0Interchange Reconstruction FreewayI-25 / SH-26 / Alameda Santa Fe Dr/Kalamath MV30-2030-091

8 10Add through lane(s) FreewayE-470 Peoria St Chambers RdMV30-2030-095

6 8Add through lane(s) FreewayE-470 Chambers Rd Jordan RdMV30-2030-095

6 8Add through lane(s) FreewayE-470 I-25 Peoria StMV30-2030-095

7 9Add through lane(s) FreewayE-470 Jordan Rd Parker RdMV30-2030-095

4 6Add through lane(s) FreewayE-470 Parker Rd Jewell AvenueMV30-2030-096

4 6Add through & HOV lanesE-470 Jewell Avenue I-70MV30-2030-096

4 6Add through lane(s) PrincipalBroncos Pkwy Easter St Potomac StMV30-2030-133

2 6Add through lane(s) PrincipalHuron St 150th Ave 160th AveMV30-2030-137

2 6Add through lane(s) Principal 48th Avenue Imboden Rd Quail Run RdMV30-2030-138

0 1Add Ramp(s) RampCastle Gate Dr. Castle Gate Dr. EB US-85 SBMV30-2030-139

0 1Grade Separation Major RegionalUS- 85 US-85 Castle Gate Dr.MV30-2030-139

0 1Add Ramp(s) RampUS- 85 US-85 SB Castle Gate Dr. WBMV30-2030-139

2 4Add through lane(s) Principal56th Avenue Tower Rd Himalaya StMV30-2030-163

2 4Add through lane(s) PrincipalChambers Road Mainstreet Lincoln AvenuePark-2003-08

4 6Add through lane(s) PrincipalLincoln Avenue Keystone Blvd. Parker Road (SH 83)Park-2007-01

4 6Add through lane(s) PrincipalLincoln Avenue Keystone Blvd. Parker Road (SH 83)Park-2007-01

4 6Add through lane(s) PrincipalLincoln Ave Keystone Blvd Parker RdPark-2007-02

2 4Add through lane(s) PrincipalCrowfoot Valley Road Chambers Rd Stroh RdPark-2007-03

2 4Add through lane(s) PrincipalCrowfoot Valley Rd Founders Pkwy Macanta RdPark-2007-04

Page 18 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) MinorCottonwood Drive Parker Road Jordan RoadPark-2008-03

2 4Add through lane(s) PrincipalJordan Road Bradbury Pkwy Hess RdPark-2008-04

0 4New Road MinorCottonwood Drive Jordan Road Chambers RoadPark-2008-08

0 2New Road PrincipalChambers Road Crowfoot Valley Road Stroh RdPark-2008-09

0 2New Road PrincipalChambers Road Southerly boundary To Crowfoot Valley RoadPark-2008-09

0 1Add Ramp(s) RampE-470 E-470 SB I-70 WBRTP -2001-228

0 2New Road MinorGun Club Rd 6th Pkwy Smith RdRTP -2001-228

0 1Add Ramp(s) RampGun Club Rd Ramp Gun Club Rd E-470 SBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 EB E-470 SBRTP -2001-228

4 6Add through lane(s) PrincipalBromley Lane Tower Rd I-76RTP -2003-001

2 4Add through lane(s) Principal152nd Avenue Washington St. York StRTP -2003-003

2 4Add through lane(s) PrincipalYork Street 150nd Ave E-470RTP -2003-003

0 2New Road PrincipalQuincy Ave Irving St Federal BlvdSher-2007-01

2 4Add through lane(s) PrincipalColorado Blvd 152nd Ave 160th Ave/SH-7Thor-2004-01

2 4Add through lane(s) Principal104th Avenue Colorado Blvd McKay RdThor-2004-03

2 4Add through lane(s)104th Ave (SH-44) Colorado Blvd McKay RdThor-2006-02 2007-084

2 4Add through lane(s) CollectorHolly Street 136th Ave. 138th Ave.Thor-2006-07

2 4Add through lane(s) Collector136th Ave. Cherry St. Holly St.Thor-2006-08

2 4Add through lane(s) Minor112th Ave. Steele St. Colorado Blvd.Thor-2006-10

Page 19 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) PrincipalWashington Street 152nd Ave. 160th Ave.Thor-2006-21

2 4Add through lane(s) Collector160th Ave. I-25 Washington St.Thor-2006-23

2 4Add through lane(s) PrincipalWashington St 152nd Ave 164th AveThor-2007-02

2 4Add through lane(s) PrincipalYork St E-470 SH-7Thor-2007-03

2 4Add through lane(s) Minor112th Avenue Clay St. Huron St.West-2003-06

4 6Add through lane(s) PrincipalWadsworth Blvd 36th Ave 46th AveWhRd-2004-01

0 2New Road CollectorCabela Drive SH-58 38nd AveWhRd-2006-01

0 4New Road CollectorCabela Drive 58th Ave 32nd AveWhRd-2006-01

Grade Separation FreewayI-70 32nd AveWhRd-2006-03

0 1Add Ramp(s) RampRamp 32nd Ave 32nd Ave/I-70 SB rampWhRd-2006-03

0 1Add Ramp(s) RampRamp I-70 Cabela DrWhRd-2006-03

0 1Add Ramp(s) RampRamp Cabela Dr 32nd AveWhRd-2006-03

0 1Reconstruction RampRamp I-70 SB 32nd AveWhRd-2006-03

0 2New Road Collector41st Ave Cabela Dr Youngfield StWhRd-2006-04

1 0Remove Component FreewayI-25 Surrey Ridge Rd RampCDT1-1998-05 1999-001


1 0Remove Component FreewayI-25 Schweiger Rd RampsCDT1-1998-05 1999-001




Page 20 of 39Oct 30, 2008


Through Lanes




8 8Remove Component FreewayUS-6 Bryant StCDT6-2004-28

Rapid Transit Rapid TransitCentral Corridor Extens Broadway DowningFsTr-2003-01

Rapid Transit Rapid TransitCentral Corridor Extens 30th/Downing St 40th St/40th AveFsTr-2003-02

park-n-Ride Park-N-RideNorth Metro Rail US-85/72nd AveFsTr-2003-05

park-n-Ride Park-N-RideNorth Metro Rail 144th AveFsTr-2003-05

park-n-Ride Park-N-RideNorth Metro Rail 162nd AveFsTr-2003-05




park-n-Ride Park-N-RideNorth Metro Rail Globerville-SwanseaFsTr-2003-05

0 2Rapid Transit Rapid TransitNorth Metro Rail DUS SH-7FsTr-2003-05


park-n-Ride Park-N-RideGold Line LRT Sheridan BlvdFsTr-2003-08

Rapid Transit Rapid TransitGold Line LRT DUS Ward RdFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT Federal BlvdFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT Ward RdFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT 38th Ave/44th Ave at InFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT Olde Town ArvadaFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT Pecos StFsTr-2003-08

Rapid Transit Rapid TransitSouthwest Corridor Ext Mineral Ave. Lucent Blvd/C-470FsTr-2003-09

park-n-Ride Park-N-RideSouthwest Corridor Ext C-470/Lucent BlvdFsTr-2003-09

Page 21 of 39Oct 30, 2008


Through Lanes




Station StationSoutheast Corridor Ext Sky RidgeFsTr-2003-11

Station StationSoutheast Corridor Ext Lone Tree Town CenteFsTr-2003-11

park-n-Ride Park-N-RideSoutheast Corridor Ext Ridge Gate PkwyFsTr-2003-11

Rapid Transit Rapid TransitSoutheast Corridor Ext Lincoln Ave RidgegateFsTr-2003-11

park-n-Ride Park-N-RideUS-36 Corridor Comm LouisvilleFsTr-2003-13

Rapid Transit Rapid TransitUS-36 Corridor Comm DUS 1st and Terry StFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm 1st and Terry StFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm US-36/E. Flatiron CirclFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm Gunbarrel RdFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm 71st Ave/Lowell BlvdFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm 30th/Pearl StFsTr-2003-13

park-n-Ride Park-N-RideUS-36 Corridor Comm US-36/Church Ranch FsTr-2003-13

park-n-Ride Park-N-RideUS-36 BRT BroomfieldFsTr-2003-14

Add HOV lane Rapid TransitUS-36 BRT I-25 Sheridan BlvdFsTr-2003-14

park-n-Ride Park-N-RideUS-36 BRT Westminster CenterFsTr-2003-14

park-n-Ride Park-N-RideUS-36 BRT Table Mesa DrFsTr-2003-14

park-n-Ride Park-N-RideUS-36 BRT US-36/McCaslin DrFsTr-2003-14

Rapid Transit Rapid TransitDenver Union Station E 16th St/WynkoopFsTr-2003-16

Rapid Transit Rapid TransitEnhanced Bus/Rail Ser RegionalFsTr-2003-17

Rapid TransitUS-36 BRT US-36 BRT 23rd StFsTr-2003-18

0 0Transit Maintenance Rapid TransitCRMF 31st StreetFsTr-2003-19

Page 22 of 39Oct 30, 2008


Through Lanes




0 0park-n-Ride Park-N-RideBroomfield pnR Reloca US 36RTD -1999-02

0 0park-n-RideStapleton pnR Smith Road east of QuRTD -1999-16

Station StationI-225 LRT Corridor City Center / ExpositionRTD -2005-10

Station StationI-225 LRT Corridor 4th AveRTD -2005-10

park-n-Ride Park-N-RideI-225 LRT Corridor Aurora City CenterRTD -2005-10

park-n-Ride Park-N-RideI-225 LRT Corridor Iliff AveRTD -2005-10

park-n-Ride Park-N-RideI-225 LRT Corridor Dayton StRTD -2005-10

Station StationI-225 LRT Corridor Fitzsimons CommonsRTD -2005-10

Rapid Transit Rapid TransitI-225 LRT Corridor Parker Rd East Corridor CommutRTD -2005-10

park-n-Ride Park-N-RideI-225 LRT Corridor Fitzsimons SouthRTD -2005-10

park-n-Ride Park-N-RideI-225 LRT Corridor Peoria St/Smith RdRTD -2005-10

park-n-Ride Park-N-RideI-255 LRT Corridor Nine MileRTD -2005-10

0 0Transit Passenger Facilities StationPearl Street 30th Street 30th StreetRTD-2003-01 2005-037

park-n-Ride Park-N-RideWest Corridor LRT Lin Wadsworth BlvdRTP -2001-214

park-n-Ride Park-N-RideWest Corridor LRT Lin Sheridan BlvdRTP -2001-214

park-n-Ride Park-N-RideWest Corridor LRT Lin OakRTP -2001-214

park-n-Ride Park-N-RideWest Corridor LRT Lin Federal CenterRTP -2001-214

0 2Rapid Transit Rapid TransitWest Corridor LRT Lin South Golden CPV LRT SpurRTP -2001-214

park-n-Ride Park-N-RideWest Corridor LRT Lin Jeffco Government CeRTP -2001-214

park-n-Ride Park-N-RideWest Corridor LRT Lin Federal BLvdRTP -2001-214

Rapid Transit StationWest Corridor LRT Lin Knox CTRTP -2001-214

Page 23 of 39Oct 30, 2008


Through Lanes




Rapid Transit StationWest Corridor LRT Lin LamarRTP -2001-214

Rapid Transit StationWest Corridor LRT Lin GarrisonRTP -2001-214

Rapid Transit StationWest Corridor LRT Lin PerryRTP -2001-214

Rapid Transit StationWest Corridor LRT Lin Red Rocks CommunityRTP -2001-214

Rapid Transit StationEast Corridor Commut Colorado BlvdRTP -2001-232

Rapid Transit Rapid TransitEast Corridor Commut Denver Union Terminal DIARTP -2001-232

park-n-Ride Park-N-RideEast Corridor Commut StatpletonRTP -2001-232

park-n-Ride Park-N-RideEast Corridor Commut Airport Blvd/40th AveRTP -2001-232

park-n-Ride Park-N-RideEast Corridor Commut DIARTP -2001-232

Page 24 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) PrincipalBuckley Road 118th Avenue Cameron DrAdCo-2000-06

2 6Add through lane(s) Principal 96th Ave Tower Rd Picadilly RdAdCo-2004-03

0 6New Road PrincipalMonaghan Rd Quincy Ave Yale AveApCo-2004-01

4 6Add through lane(s) PrincipalBroncos Pkwy Havana St Peoria StApCo-2007-03

2 6Add through lane(s) PrincipalWatkins Rd Quincy Ave I-70ApCo-2007-09

2 6Add through lane(s) PrincipalYale Ave Monaghan Rd Hayesmount RdApCo-2007-11

2 4Add through lane(s) MinorDunkirk St Ceylon St Louisiana AveAura-1995-05

2 4Add through lane(s) MinorMississippi Avenue Tower Road Ceylon StAura-1995-05

2 6Add through lane(s) Principal 56th Avenue E-470 Imboden RoadAura-1996-03

2 6Add through lane(s) PrincipalTower Road 6th Avenue Colfax AvenueAura-1998-13

0 4New Road CollectorMississippi Avenue Harvest Rd Powhaton RdAura-1998-16

4 6Add through lane(s) MinorAurora Parkway Picadilly GartrellAura-1998-23

2 4Add through lane(s) MinorAurora Parkway Gartrell Smoky Hill RdAura-1998-23

0 6New Road MinorAurora Parkway Parker Rd PicadillyAura-1998-23

2 4New Road Principal 64th Avenue Harvest Road Powhaton RoadAura-1998-26

2 4Add through lane(s) PrincipalGun Club Rd Yale Ave. Mississippi Ave.Aura-1999-01

4 6Add through lane(s) PrincipalGun Club Rd Yale Ave. Mississippi Ave.Aura-1999-01

2 4New Road CollectorHarvest Road Quincy Ave 1/2 mile south of BellevAura-2001-05

0 3New Road CollectorGlasgow Dr Smoky Hill Rd Monaghan Section LinAura-2001-08

Page 25 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) PrincipalPowhaton Rd Smoky Hill Rd County Line RdAura-2001-12

2 6Add through lane(s) PrincipalSmoky Hill Rd Glasglow Dr Powhaton RdAura-2001-12

3 6Add through lane(s) PrincipalHarvest Mile Road 56th Ave 64th AveAura-2004-01

2 4Add through lane(s) Principal 64th Avenue Harvest Mile Road Powhaton RdAura-2004-02

2 6Add through lane(s) Principal6th Pkwy SH-30 E-470Aura-2004-03

2 6Add through lane(s) PrincipalPicadilly Rd Smith Road 48th AveAura-2004-10

0 6New Road PrincipalPicadilly Rd 64th Ave Aurora City LimitsAura-2004-12

0 6New Road PrincipalPicadilly Rd 56th Ave 64th AveAura-2004-12

0 4New Road Collector38th Avenue Imboden ManilaAura-2006-03

0 4New Road CollectorShumaker Rd SH-36 38th AvenueAura-2006-05

2 4Add through lane(s) CollectorShumaker Rd 38th Avenue 48th AvenueAura-2006-05

2 6Add through lane(s) CollectorImboden Rd 56th Ave 64th AveAura-2006-06

2 4Add through lane(s) PrincipalBuckley Road 136th Avenue Bromley LaneBrgh-2004-01

0 6New Road Principal120th Avenue 120th Avenue Annex Emerald StBrmf-2006-05

2 4Add through lane(s) Major RegionalUS 85 Castlegate Meadows PkwyCDT1-2001-02 2001-154

4 4Add through lane(s) Major RegionalUS- 85 C-470 Highlands Ranch PkwyCDT1-2001-02 2001-154

2 4Add through lane(s) Major RegionalUS- 85 Louviers CDOT MP 192.2CDT1-2001-02 2001-154

2 6Add through lane(s) PrincipalTower Road Pena Boulevard 105th AvenueCoCy-1995-34

2 6Add through lane(s) Principal120th Ave Tower Rd Picadilly RdCoCy-2007-02

Page 26 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) Principal120th Ave E-470 Tower RdCoCy-2007-03

0 6New Road PrincipalPicadilly Rd 96th Ave 120th AveCoCy-2007-04

0 2New Road CollectorValley Drive South Street Plum Creek PkwyCRck-1995-03

0 4Add through lane(s) MinorPrairie Hawk Drive Franktown Rd Plum Creek PkwyCRck-1995-08

2 4New Road MinorPrairie Hawk Drive Wolfensberger Road Franktown RdCRck-1995-08

4 6Add through lane(s) PrincipalAlameda Avenue Morrison Rd Federal BlvdDenv-2004-01

4 6Add through lane(s) Principal56th Avenue Himalaya St Picadilly RdDenv-2004-04

4 6Add through lane(s) Principal56th Ave Pena Blvd Tower RdDenv-2004-05

0 6New Road PrincipalPicadilly Rd 80nd Ave 96th AveDenv-2004-07

4 6Grade Separation PrincipalAlameda Avenue Santa Fe Cherokee StreetDenv-2005-03

0 4New Road Collector40th Avenue Central Park Blvd Clinton StreetDenv-2005-17

0 4New Road Principal 64th Avenue Tower Rd Denver/Aurora City LimDenv-2006-26

2 4Add through lane(s) PrincipalHess Rd I-25 Castle Pine/Hess RoadDgCo-2000-10

2 4New Road PrincipalHess Rd Newland Gulch Chambers RdDgCo-2000-10

2 4New Road PrincipalHess Rd Castle Pines Rd Newland GulchDgCo-2000-10

2 4Add through lane(s) PrincipalWaterton Rd South Platte River Rd Campfire StDgCo-2008-02

2 4Add through lane(s) PrincipalRampart Range Rd Waterton Rd Titan RdDgCo-2008-03

2 4Add through lane(s) PrincipalTitan Rd Rampart Range Rd Santa Fe Dr.DgCo-2008-04

0 1Add Ramp(s) RampE-470 E-470 SB Quebec StE470-2005-03

Page 27 of 39Oct 30, 2008


Through Lanes




0 1Add Ramp(s) RampE-470 E-470 NB Quebec StE470-2005-03

4 4Grade Separation FreewayE-470 QuebecE470-2005-03

0 1Add Ramp(s) RampQuebec St Quebec St E-470 SBE470-2005-03

0 1Add Ramp(s) RampQuebec St Quebec St E-470 NBE470-2005-03

2 4Add through lane(s) Principal 64th Avenue Himalaya Rd Harvest Mile RdMV20-2020-021

2 6Add through lane(s) Principal 64th Avenue Aurora City Limit Himalaya StMV20-2020-022

2 4Add through lane(s) Principal 96th Avenue SH-2 Buckley RoadMV20-2020-032

0 4New Road Principal 96th Avenue Buckley Road Tower RoadMV20-2020-033

5 6Add through lane(s) PrincipalSH-26 / Alameda Aven Federal Boulevard I-25MV20-2020-038

2 4Add through lane(s) PrincipalChambers Road Newlin Gulch Blvd MainstreetMV20-2020-056

3 6Add through lane(s) PrincipalJewell Avenue Himalaya Rd E-470MV20-2020-095

2 4New Road PrincipalPlum Creek Parkway Gilbert Street Ridge RoadMV20-2020-152

2 4Add through lane(s) PrincipalRidge Road Plum Creek Parkway SH-86MV20-2020-163

2 4Add through lane(s) PrincipalStroh Rd J. Morgan Blvd Crowfoot ValleyMV20-2020-178

2 4Add through lane(s) PrincipalStroh Road Crowfoot Valley Rd Jay Morgan BlvdMV20-2020-178

4 6Add through lane(s) PrincipalTower Road 48th Ave 56nd AveMV20-2020-183

2 4Add through lane(s) PrincipalWolfensberger Road Coachline Road I-25MV20-2020-206

0 2New Road Minor 17th Place I-225 NE ramp Potoma I-225 NE ramp PotomaMV20-2020-223

3 3Grade Separation FreewayI-225 Colfax AveMV20-2020-223

Page 28 of 39Oct 30, 2008


Through Lanes




0 2New Road Frontage RoadI-225: Colfax E side Colfax Ave 17th PlaceMV20-2020-223

0 2Add Ramp(s) RampI-225: Colfax E side 17th Place I-225 NBMV20-2020-223

0 2Add Ramp(s) RampI-225: Colfax W side I-225 SB 17th PlaceMV20-2020-223

0 2New Road Frontage RoadI-225: Colfax W side 17th Place Colfax AveMV20-2020-223

0 2New Road CollectorPotomac connector Sand Creek Pkwy Potomac StMV20-2020-223

4 6Add through lane(s) PrincipalWadsworth Blvd 6th Ave 14th AveMV30-2030-004

2 6Add through lane(s) PrincipalImboden Rd 48th Ave 56th AveMV30-2030-040

2 4Add through lane(s) CollectorManila Rd 38th Ave 48th AveMV30-2030-042

2 4Add through lane(s) CollectorManila Rd I-70 38th AvenueMV30-2030-042

2 4Add through lane(s) PrincipalQuebec Street 120th Ave 128th AveMV30-2030-043

2 4Add through lane(s) PrincipalYork St 160th Ave (SH-7) 168th AveMV30-2030-051

0 1Add Ramp(s) RampHarvest Miles Rd Harvest Miles Rd I-70 EBMV30-2030-061

0 1Add Ramp(s) RampHarvest Miles Rd Harvest Miles Rd I-70 WBMV30-2030-061

0 1Add Ramp(s) RampI-70 I-70 WB Harvest Miles RdMV30-2030-061

4 4Grade Separation FreewayI-70 Harvest Miles Rd Harvest Miles RdMV30-2030-061

0 1Add Ramp(s) RampI-70 I-70 EB Harvest Miles RdMV30-2030-061

0 4New Road Principal 64th Avenue Powhaton Rd Monaghan RdMV30-2030-068

0 4New Road Minor 6th Avenue Powhaton Rd Monaghan RdMV30-2030-069

0 6New Road PrincipalHarvest Mile Road I-70 56th AveMV30-2030-074

0 4New Road PrincipalPicadilly Road Jewell Ave 6th Ave PkwyMV30-2030-080

Page 29 of 39Oct 30, 2008


Through Lanes




0 6New Road PrincipalQuail Run Rd I-70 48th AveMV30-2030-081

4 6Grade Separation FreewayI-70 Picadilly RdMV30-2030-083

4 6Add through lane(s) PrincipalAlameda Avenue I-25 Lincoln StMV30-2030-090

4 6Add through lane(s) PrincipalAlameda Avenue Colorado Blvd Cherry Creek Dr NMV30-2030-125

4 6Add through lane(s) PrincipalAlameda Avenue Cherry Creek Dr N Steele StMV30-2030-125

2 4Add through lane(s) PrincipalQuebec Street 132nd Ave 160th AveMV30-2030-142

0 6New Road Principal 48th Avenue Powhaton Rd Monaghan RdMV30-2030-147

2 6Add through lane(s) Principal56th Avenue Havana Street Pena BlvdMV30-2030-156

2 4New Road PrincipalSouthwest Ring Rd E of Auburn Dr I-25MV30-2030-159

2 4Add through lane(s) PrincipalSouthwest Ring Rd Wolfensburger Rd E of Auburn DrMV30-2030-160

2 4Add through lane(s) PrincipalSouthwest Ring Rd Meadows Pkwy Wolfensburger RdMV30-2030-160

4 6Add through lane(s) Principal56th Avenue Tower Rd Himalaya StMV30-2030-163

2 6Add through lane(s) Principal120th Avenue Sable Blvd E-470RTP -2001-08

Grade Separation FreewayI-25 RidgegateRTP -2001-227

0 1Add Ramp(s) RampI-25 I-25 NB RidgegateRTP -2001-227

0 1Add Ramp(s) RampI-25 I-25 SB RidgegateRTP -2001-227

0 1Add Ramp(s) RampRidgegate Ridgegate I-25 SBRTP -2001-227

0 1Add Ramp(s) RampRidgegate Ridgegate I-25 NBRTP -2001-227

2 4Add through lane(s) PrincipalQuebec Street 128th Ave 132th AveThor-2001-33

Page 30 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) CollectorMcKay Road 104th Ave. 103rd Ave.Thor-2006-11

4 6Add through lane(s) Principal104th Ave Marion St Colorado BlvdThor-2006-20

2 4Add through lane(s) MinorWestminster Blvd. US-36 103rd Ave.West-2006-01

2 0Remove component RampI-225: Colfax E side I-225 SB Colfax AveMV20-2020-223

2 0Remove component RampI-225: Colfax W side Colfax Ave I-225 NBMV20-2020-223

0 0park-n-Ride Park-N-RideI-25 Wagon RoadFsTr-2003-06

0 0park-n-Ride Park-N-RideI-25 ThorntonFsTr-2003-06

0 0park-n-Ride Park-N-RideI-76 Bromley RoadFsTr-2003-06

0 0park-n-Ride Park-N-RideUS-85 BrightonFsTr-2003-06

park-n-Ride Park-N-RideGold Line LRT Arvada RidgeFsTr-2003-08

0 0park-n-Ride Park-N-RidePine Junction pnR US 285RTD -1999-14

Page 31 of 39Oct 30, 2008


Through Lanes




2 6Add through lane(s) PrincipalArapahoe Road Waco St Himalaya StApCo-2000-01

4 6Add through lane(s) PrincipalBroncos Pkwy Jordan Rd Parker RdApCo-2007-04

2 4Add through lane(s) Major RegionalUS-85 Daniel Park CastlegateCDT1-2001-02 2001-154

5 7Add through lane(s) PrincipalAlameda Ave Lipan St Santa Fe Dr.CDT6-1998-06 1999-009

8 8Reduce Lanes FreewayI-25 Santa Fe Drive Kalamath StCDT6-1998-06 1999-009

8 8Reconstruction FreewayI-25 Kalamath St Santa Fe DriveCDT6-1998-06 1999-009

Interchange Reconstruction FreewayI-25 Alameda AveCDT6-1998-06 1999-009

8 8Reduce Lanes FreewayI-25 Santa Fe Drive US-6CDT6-1998-06 1999-009

Interchange Reconstruction FreewayI-25 Santa Fe DrCDT6-1998-06 1999-009

4 6Add through lane(s) PrincipalTower Road 38th Ave. 48th AveDenv-2001-16

4 6Add through lane(s) PrincipalBroadway Arizona Ave Mississippi AveDenv-2005-24

2 4Add through lane(s) PrincipalCounty Line Road Phillips St University BlvdDgCo-2004-11

2 4New Road PrincipalChambers Rd. Crowfoot Valley Rd. Hess Road.DgCo-2006-03

2 4New Road PrincipalChambers Rd. Stroh Rd. Hess RoadDgCo-2006-03

0 2New Road PrincipalChambers Rd. Crowfoot Valley Rd. Hess RoadDgCo-2006-03

2 4Add through lane(s) PrincipalCanyons Pkwy (Arterial Crowfoot Valley Rd Hess RdDgCo-2008-01

2 4Add through lane(s) Minor9th Avenue Alpine St East County Line RdLong-2005-02

2 4Add through lane(s) PrincipalBayou Gulch/Chamber Parker Road Pradera PkwyMV20-2020-043

2 4Add through lane(s) PrincipalBayou Gulch/Chamber Pradera Pkwy Southern Boundary of MV20-2020-043

0 1Add Ramp(s) Ramp48th Ave 48th Ave E-470 NBMV30-2030-025

Page 32 of 39Oct 30, 2008


Through Lanes




0 1Add Ramp(s) Ramp48th Ave 48th Ave E-470 SBMV30-2030-025

0 1Add Ramp(s) RampE-470 E-470 NB 48th AveMV30-2030-025

0 1Add Ramp(s) RampE-470 E-470 SB 48th AveMV30-2030-025

2 2Grade Separation FreewayE-470 48th AveMV30-2030-025

2 4Add through lane(s) PrincipalSH-119 Black Hawk proposed Black Hawk MV30-2030-111

2 4New Interchange PrincipalSH-119 Black Hawk TunnelMV30-2030-111

4 6Add through lane(s) PrincipalArapahoe Road Himalaya St Liverpool StMV30-2030-131

0 6New Road PrincipalPicadilly Road 68th Ave 80nd AveMV30-2030-146

0 4New Road Minor 6th Avenue Monaghan Rd Watkins RdMV30-2030-169

2 4Add through lane(s) PrincipalChambers Road Crowfoot Valley Road Stroh RoadPark-2008-09

2 4Add through lane(s) PrincipalChambers Road Southerly boundary To Crowfoot Valley RoadPark-2008-09

0 1Add Ramp(s) RampE-470 E-470 NB I-70 EBRTP -2001-228

0 1Add Ramp(s) RampE-470 E-470 SB I-70 EBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 WB E-470 SBRTP -2001-228

0 1Add Ramp(s) RampI-70 I-70 WB E-470 NBRTP -2001-228

0 1Add Ramp(s) RampI-70 Ramp I-70 EB E-470 NBRTP -2001-228

4 6Add through lane(s) PrincipalSmoky Hill Road Pleasant Run Pkwy Versailles PkwyRTP -2001-82

2 4Add through lane(s) Principal104th Avenue McKay Road US-85Thor-1998-02

0 4New Road Minor112th Avenue Pierce/Main St Wadsworth PkwyWest-2006-03

Page 33 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) PrincipalWashington Street 52nd Avenue 58th AvenueAdCo-1997-01

4 4Interchange Reconstruction FreewayUS-36 Table Mesa DrBlCo-2007-03

2 4Add through lane(s) Major RegionalUS 85 Louviers MP 191.75CDT1-2001-02 2001-154

0 1Add Ramp(s) RampUS 285 US 285 NB Pine Junction/CR 126CDT1-2004-11

0 1Add Ramp(s) RampUS 285 US 285 SB Pine Junction/CR 126CDT1-2004-11

0 1Add Ramp(s) RampUS 285 Pine Junction/CR 126 US 285 SBCDT1-2004-11

2 4Grade Separation Major RegionalUS 285 Richmond Hill Road Kings Valley DriveCDT1-2004-11

2 4Grade Separation Major RegionalUS 285 Pine Junction InterchaCDT1-2004-11

0 1Add Ramp(s) RampUS285 Pine Junction/CR 126 US 285 NBCDT1-2004-11

0 1Add Ramp(s) RampSH-119 SH-119 NB SH-52CDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-119 SB SH-52CDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-52 SH-119 NBCDT4-2001-07 2001-252

4 4Grade Separation Major RegionalSH-119 SH-52CDT4-2001-07 2001-252

0 1Add Ramp(s) RampSH-119 SH-52 SH-119 SBCDT4-2001-07 2001-252

4 6Add through lane(s) FreewayI-225 North Ramps of Parker South Ramps of MissisCDT6-1998-04 1999-006

6 8Interchange Reconstruction RampI-25 84th Ave I-25 SBCDT6-2004-34

6 8Grade Separation FreewayI-25 84th AveCDT6-2004-34

6 8Interchange Reconstruction RampI-25 I-25 SB 84th AveCDT6-2004-34

6 8Interchange Reconstruction RampI-25 I-25 NB 84th AveCDT6-2004-34

6 8Interchange Reconstruction RampI-25 84th Ave I-25 NBCDT6-2004-34

4 6Add through lane(s) FreewayI-270 Vasquez Blvd I-70CDT6-2004-36

Page 34 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) MinorColorado Blvd County Line Dry CreekCent-2007-02

4 6Add through lane(s) PrincipalBroadway Arizona Ave MississippiDenv-2005-24

0 0New Road FreewayPena Blvd Corridor I-70 TowerDenv-2006-22

2 4Add through lane(s) Principal 38th Ave Brighton Blvd Walnut StDenv-2007-13

2 4Add through lane(s) PrincipalPeoria Street E-470 .7 miles s/Lincoln AveDgCo-2003-001

0 4New Road PrincipalPeoria Street .75 mi S. Lincoln Ave MainstreetDgCo-2004-02

2 4Add through lane(s) PrincipalChambers widening Stroh Rd Hess RdDgCo-2006-03

0 1Add Ramp(s) RampE-470 112th Ave E-470 SBE470-2007-01

0 1Add Ramp(s) RampE-470 E-470 SB 112th AveE470-2007-01

0 1Add Ramp(s) RampE-470 112th Ave E-470 NBE470-2007-01

0 1Add Ramp(s) RampE-470 E-470 NB 112th AveE470-2007-01

4 4Grade Separation FreewayE-470 112th AvenueE470-2007-01

4 4Grade Separation FreewayE-470 88th AvenueE470-2007-02

0 1Add Ramp(s) RampE-470 E-470 NB 88th AveE470-2007-02

0 1Add Ramp(s) RampE-470 88th Ave E-470 SBE470-2007-02

0 1Add Ramp(s) RampE-470 E-470 SB 88th AveE470-2007-02

0 1Add Ramp(s) RampE-470 88th Ave E-470 NBE470-2007-02

6 8Add through & HOV lanes FreewayE-470 I-25 South Parker RoadE470-2008-02

2 4Add through lane(s) PrincipalQuincy Avenue C-470 Simms StreetJfCo-2006-03

2 4Add through lane(s) Principal104th Avenue US-85 SH-2MV20-2020-005

Page 35 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) PrincipalSouth Boulder Road Lowell Blvd Sheridan PkwyMV20-2020-176

2 4New Road PrincipalThornton Pkwy Colorado Blvd Riverdale RoadMV20-2020-179

2 4Add through lane(s) PrincipalColorado Blvd SH-7 168th AveMV30-2030-033

4 6Add through lane(s) FreewayE-470 I-70 Pena BlvdMV30-2030-097

6 8Add through lane(s) PrincipalArapahoe Road I-25 west ramps I-25 east rampsRTP -2001-72

4 6Add through lane(s) PrincipalSheridan Blvd US-36 south ramps US-36 north rampsRTP -2001-78

2 4Add through lane(s) MinorOld Wadsworth Blvd. 92nd Ave. Church Ranch BlvdWest-1995-18

Miscellaneous/Design FreewayI-70 Eisenhower Tunnel C-470CDT1-2004-07

park-n-Ride Park-N-RideGold Line LRT 38th Ave/44th Ave at InFsTr-2003-08

park-n-Ride Park-N-RideGold Line LRT Ward RdFsTr-2003-08

park-n-Ride Park-N-RideUS-36 BRT BroomfieldRTD -2006-11

0 2Add HOV lane Rapid TransitUS-36 BRT Sheridan Blvd Table Mesa Dr.RTD -2006-11

park-n-Ride Park-N-RideUS-36 BRT Table MesaRTD -2006-11

park-n-Ride Park-N-RideUS-36 BRT WestminsterRTD -2006-11

park-n-Ride Park-N-RideUS-36 BRT US-36/McCaslinRTD -2006-11

park-n-Ride Park-N-RideEast Corridor Commut Colorado BlvdRTP -2001-232

Page 36 of 39Oct 30, 2008


Through Lanes




2 4Add through lane(s) PrincipalSH-7 Riverdale Rd US-85AdCo-2004-07

2 4Add through lane(s) PrincipalSH-7 164th Ave Dahlia StAdCo-2004-07

2 4Add through lane(s) MinorHudson Mile Rd Quincy Ave Yale AveApCo-2007-12

0 4New Road MinorHampden Ave Watkins Rd Monaghan RdApCo-2007-14

0 0Highway Operational Major RegionalFoothills Pkwy Iris Longmont DiagonalBlCo-2004-03

0 0Highway Operational Major RegionalIris Ave US-36 47thBlCo-2004-03

0 0Highway Operational Major RegionalLongmont Diagonal Foothills Pkwy Hoover RdBlCo-2004-03

0 2Add Ramp(s) RampPnR PnR US-36 NB/120th Ave/Brfd-1995-04

0 2Add Ramp(s) RampRamp US-36/120th Ave/PnR Wadsworth BlvdBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd NB US-36 WBBrfd-1995-04

0 1Add Ramp(s) RampRamp 120th Avenue US-36Brfd-1995-04

0 1Add Ramp(s) RampRamp 120th Avenue Wadsworth BlvdBrfd-1995-04

0 1Add Ramp(s) RampRamp 120th Ave US-36/Wadsworth BlvdBrfd-1995-04

0 2Add Ramp(s) RampRamp Wadsworth Blvd SB,W US-36 WBBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 WBBrfd-1995-04

0 2Add Ramp(s) RampRamp US-36 EB Wadsworth BlvdBrfd-1995-04

0 1Add Ramp(s) RampRamp US-36 EB Wadsworth Blvd SBBrfd-1995-04

0 1Add Ramp(s) RampRamp US-36 EB Wadsworth Blvd NBBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 EB/120th AveBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB 120th AveBrfd-1995-04

0 1Add Ramp(s) RampRamp Wadsworth Blvd SB US-36 EBBrfd-1995-04

Page 37 of 39Oct 30, 2008


Through Lanes




0 2Add Ramp(s) RampRamp 120th Ave/Wadsworth US-36 EBBrfd-1995-04

0 1Add Ramp(s) RampUS-36 US-36 NB 120th Ave/Wadsworth Brfd-1995-04

4 6Add through lane(s) Major RegionalWadsworth Blvd US-36 south ramps US-36 north rampsBrfd-1995-04

2 4Add through lane(s) Major RegionalUS-85 Cook Ranch LouviersCDT1-2001-02 2001-154

2 4Grade Separation Major RegionalUS-285 Kings Valley Drive Shaffers CrossingCDT1-2004-11

6 8Add through lane(s) PrincipalArapahoe Road I-25 Potomac StCDT6-2004-31

6 8Add through lane(s) FreewayI-25 US-36 Thornton PkwyCDT6-2004-34

8 10Add through lane(s) FreewayI-70 I-270 Havana StCDT6-2004-40

4 6Add through lane(s) FreewayUS-36 96th St Interlocken EastCDT6-2004-41

0 4New Road Minor104th Ave E-470 Picadilly RdCoCy-2007-01

0 4New Road Minor112th Ave SH-2 Picadilly RdCoCy-2007-05

0 4New Road Minor 88th Ave Tower Rd Picadilly RdCoCy-2007-06

4 6Add through lane(s) FreewayE-470 I-25 North I-76E470-2007-06

2 6Add through lane(s) Principal104th Avenue SH-2 E-470MV20-2020-006

4 6Add through lane(s) PrincipalHampden Avenue Colorado Boulevard I-25MV20-2020-073

5 6Add through lane(s) PrincipalHampden Avenue (SH- Dayton Street Havana StreetMV20-2020-074

6 8Add through lane(s) PrincipalSimms St US-6 south ramps US-6 north rampsMV30-2030-002

4 6Add through lane(s) PrincipalKipling Street US-6 south ramps US-6 north rampsMV30-2030-003

4 6Add through lane(s) Major RegionalWadsworth Parkway 92nd Avenue SH-128/ new 120th AvRTP -2001-12

Page 38 of 39Oct 30, 2008


Through Lanes




6 8Add through lane(s) Major RegionalParker Road Quincy Avenue Hampden AvenueRTP -2001-27

4 6Add through lane(s) PrincipalKipling St I-70 south ramps I-70 north rampsRTP -2001-75

park-n-Ride Park-N-RideI-25 SH-7RTD -2008-03

park-n-Ride Park-N-RideI-25 144th AveRTD -2008-04

Page 39 of 39Oct 30, 2008

APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION

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APPENDIX B TRANSPORTATION MODEL CALIBRATION DESCRIPTION

Introduction

In support of the conformity determination for the 2035 Regional Transportation Plan (RTP), the

Denver Regional Council of Governments’ (DRCOG) Metro Vision Resource Center employed the

Regional Socio-economic Model together with Compass, the updated regional travel modeling

system. Compass is the product of the Refresh Phase of the Integrated Regional Model (IRM)

project, initiated in 2002, and completed in 2004. Recently, there were some minor adjustments,

and a second version was released in early 2007. Compass 2.0 includes some re-calibration of

the mode choice model to better match observed transit ridership for the 2005, and conversion to

the latest version of TransCAD, version 4.8.

In the mid-1990s, DRCOG, Regional Transportation District (RTD), Colorado Department of

Transportation (CDOT), and other regional planning partners decided to do a comprehensive

update of the Denver Regional Travel Model. The project participants realized the needs for

information were well beyond the capabilities of the then-current model. They also saw the

benefits of on-going research and enhancements of travel modeling theory and practice to enable

them to better address issues. As in most research fields, travel and land-use modeling was

advancing and the regional partners wanted to keep pace with these advances.

The first step in this effort was to conduct the Travel Behavior Inventory (TBI) project, to provide

more up-to-date and detailed data on which to base a new modeling system. The TBI project

involved multiple surveys of travel in the Denver metropolitan area, including:

The Household Survey – a travel diary survey that gathered complete travel information for

an assigned day for approximately 5,000 households;

The Front Range Travel Survey - a survey of vehicles entering and leaving the metropolitan

area;

The Commercial Vehicle Survey – a survey that gathered complete travel information from

more than 800 commercial vehicles on an assigned day; and

The Non-Respondent Populations Project - an effort to evaluate whether those who did not

respond to the survey exhibited different travel behavior than people who did respond to the

survey.

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The bulk of this survey work was conducted in 1997-1998, with data “cleaning” and summary

conducted through 2001. Immediately following the conclusion of the TBI project, the Integrated

Regional Model (IRM) project was initiated, and began using TBI data to build a new modeling

system for the region.

The IRM project is conducted in three phases. The first of these phases was the Refresh Phase,

which resulted in the development of the Compass travel model, as further described below. The

second phase, the Vision Phase, is also complete, and produced a “blueprint” for a next-

generation, activity-based travel and socio-economic modeling system. The third phase, the

Update Phase, is in its final stages and will implement the blueprint.

The Model Refresh Phase: Description and Elements

The overall goal of the IRM project was to completely re-build the regional modeling system,

incorporating advances in research and practice, so that the model could better address regional

planning issues. However, project participants felt that the needs of the regional planning process

were more immediate, and so conducted the Model Refresh Phase to develop such a set of early-

implementation improvements. Work on the Refresh Phase of the IRM project was completed in

2004, and included the following improvements:

Transfer of the regional model from the DOS-based MinUTP software package to the

Windows-based TransCAD software package. The model is now run on TransCAD version

4.8, an upgrade from version 4.7, on which the first Compass version was run. The most

significant consequence of this upgrade is the faster model processing time.

Conversion from the old 2,664 TAZ system to a new 2,800 Transportation Analysis Zone

(TAZ) system – Figure 1 shows the new TAZ system used with Compass. A geographic

information system version of this map may be found on DRCOG’s website at

http://www.drcog.org/index.cfm?page=Maps.

A complete re-estimation of the trip generation model using the new TBI data.

A complete re-estimation of the trip distribution model using the new TBI data, including use

of a limited new set of k-factors to adjust gravity model outcomes to better match observed

travel patterns.

Update and simplification of the model element that assigns each TAZ to one of five area

types based on employment and population density.

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http://www.drcog.org/index.cfm?page=M

http://www.drcog.org/index.cfm?page=M

A complete re-development of the model element that predict parking costs for future years

in high-density areas such as the Denver central business district.

Numerous adjustments to the mode choice model to produce better bus and rail ridership

estimates, while maintaining consistency with federal modeling guidelines.

Use of observed speed data in trip distribution and highway assignment processes so that

the model now reproduces both observed volumes and observed speeds in the validation

year.

The improvements described above left the model’s traditional four-step structure intact, but

resulted in significant improvements in the accuracy of the model’s outcomes. All the primary

model elements, including the socio-economic model elements, are briefly described below, and

Figure 2 shows the flow of steps in the Compass model process.

Demographic Development Estimation

DRCOG works with a panel of economists and planners from both private and public sectors to

review current growth trends and evaluate the output of a regional forecast model. This model

relates the regional economy to national forecasts by industrial sector. Once employment levels

are predicted, a demographic model is used to determine the migration levels needed to generate

the labor force to fill the expected jobs. The forecasts are reviewed annually with major revisions

expected every five years.

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Figure 2 Socioeconomic Model Elements and Flow

Panel Review of Model Variables

DRCOG Draft Forecasts by TAZ (June/September 2004

Panel Review of Variable Weights for TAZ scoring

Community Review of Draft Forecasts

Utility Functions

Maximum allowable jobs and house-holds (capacity)

Allocate development to TAZs

Socioeconomic Model

Final 2030 Forecasts of employment and households

Regional Employment and Population forecast control totals

Small Area Development Estimates

To provide development data at a level of detail necessary for the travel model, the regional urban

activity forecasts are disaggregated into 2,800 transportation analysis zones (TAZs). The

allocation to TAZs is carried out based on an attractiveness index for each TAZ, which in effect

develops a desirability “score” for each TAZ. This score is based on roughly 20 variables such as

miles of arterial roadway in the TAZ, rapid transit service, vacant land, local land use plans,

growth over the last decade, water/wastewater service, environmental constraints, and income

characteristics. Separate attractiveness indices and allocations are developed for commercial

and retail employment, and for households. The zones are filled with new development in the

given category starting with the TAZ with the highest attractiveness index. The amount of

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development allocated to a TAZ is controlled by the amount of vacant land in the zone available

for residential or employment uses, the expected density in the zone, and other factors. The

model works its way through the list of zones until all of the growth is allocated. The effects of

several regional planning policies also are taken into account in the model: open space plans

affect the amount of developable land in the relevant TAZs; the regional urban growth boundary

affects expected densities, and the development totals in TAZs outside that boundary; and

planned urban centers affect the development capacity in the TAZs in which they are planned.

Figure 3 shows a flow diagram of the process of socioeconomic forecasting in the Denver region.

Highway and Transit System

The Denver Regional Travel Model includes a detailed description of the area’s transportation

system. The highway network is represented by over 25,000 directional road segments,

described according to location, length, number of lanes, functional classification, and area type.

High-occupancy vehicle (HOV) lanes also are represented as special links. Tollway links are

assessed an additional impedance to reflect toll charges. The model also includes a fully detailed

representation of transit facilities, including all bus and rapid transit lines, park-n-Ride lots, bus

stops, and walk access/egress routes. Bus routes follow the same highway network as

automobiles trips, and bus speeds are based on auto speeds. Rail speeds are developed based

on transit schedule information. Capture areas for park-n-Ride lots are quite broad, permitting

trip-makers in the model to select the lot that produces the shortest overall transit path to their

destination. As part of the process of estimating highway and transit use, minimum impedance

paths are calculated using time, distance and toll cost over the highway and HOV system, and

time and cost over the transit system.

Trip Generation

Trip generation in the Denver Regional Travel Model is based on a “cross-classification” model

that makes use of the differences in trips per day made by different types of households. Smaller

households make fewer trips than larger households and lower income households make fewer

trips (especially work trips) than higher income households. Trip generation is conducted

separately for the following six trip purposes:

Home-Based Work: Trips between a worker’s home and place of employment. These trips

are generated separately in three income groups.

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Home-Based Non-Work: Trips between home and any other destination for any non-work

purpose.

Non-Home Based: Trips that have neither end at home, regardless of purpose.

Commercial trips: Truck and other trips generated at places of business.

Internal/External Trips: Trips with one end inside the model area and one end outside.

External/External Trips: Trips with both ends outside the model area (i.e., trips passing

through the model area.)

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Figure 3

Travel Model Elements and Flow

Factors Considered

Congestion

Travel Time

Cost

Travel Time

Income

Type of Trip

Opportunities

Travel Time

Special Generators

Employment Type

Income

Household Size

Local Land Use Plans

Roadways & Transit

Past Growth

Water Supply

Vacant Land

In-Migration

Births/Deaths

Industrial Base

National Economic Forecasts

Travel Path

Travel Mode

Trip Destination

Regional Growth Totals

Small Area Development

Estimates

Highway & Transit

System

Number of Trips

Cost

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The model includes relatively few special generator locations (i.e., locations at which trip

generation behavior is significantly different than the regional average.) Special generation is

performed for the Denver International Airport and for the Auraria Higher Education Campus.

Trip Distribution

The Denver Regional Travel Model uses a standard “gravity model” process to distribute all trips

except external-external trips. A gravity model assigns larger numbers of trips between large

zones (zones with a lot of development) that are close together, and fewer trips between smaller

zones (zones with a small amount of development) that are farther apart. Separate gravity models

were developed for each trip purpose, with distinct friction (calibration) factors for each. Separate

friction factors also were developed for work trips for each of the three income classes. In

addition, special ‘K’ factors were applied to the Boulder urbanized area to account for the fact that

Boulder is somewhat more self-contained (i.e., both ends of a trip are somewhat more often in the

Boulder area) than the regional friction factors would otherwise suggest. K-factors also were

developed for a few other locations, to better match observed data in the base year,

compensating for insensitivities in the gravity model process. Also, special adjustments were

made for Denver International Airport trips, to better reflect the results of an air passenger survey

conducted in 1995. The most recent version of Compass includes an update of trip attraction

rates for DIA, to better match counted volumes on Peña Boulevard.

Mode Choice

Compass includes a mode choice component that estimates the number of trip-makers that will

select each available travel mode, given the travel conditions that each system user faces,

depicted in the model as described above in the section “Highway and Transit System.” Separate

mode choice models are used for each trip purpose, to take into account the fact that people use

different travel modes differently for different trip purposes. For example, people make different

use of transit for work trips than they do for shopping trips, as shopping involves transporting

purchased items that may be difficult to carry on transit vehicles. Internal work trips are estimated

using a multinomial logit model for the following modes:

Drive-alone;

Two-person carpool;

Three-plus person carpool;

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Transit via walk access; and

Transit via auto access.

For non-work trips, the choice is simply between auto and transit. All mode choice models take

into account trip time and cost.

The model also is calibrated to match observed trip data separately for four geographic sub-

markets in which trip-makers exhibit distinctly different behavior: the Denver central business

district, the City of Boulder, trips to Denver International Airport, and the remainder of the region.

Treating each of these areas separately ensures that the model does not match a region-wide

total of observed transit travel simply by making compensating errors in important areas of the

region. The most recent version of Compass includes a re-calibration of the DIA geographic sub-

market, so that mode choice outcomes better match counted volumes on Sky-Rider services.

Travel Time-of-Day

It is obvious to anyone who drives that congestion varies throughout the day, with some periods

highly congested, and others very little. To reflect this reality as faithfully as possible, the roadway

system depicted in the model includes estimates of the hourly capacity of different types of roads,

with freeways having the greatest capacity, and roads such as minor arterials having considerably

less. To model the variation of congestion through the day, the 24-hour automobile trips

produced by the mode choice model are divided into several time “slices,” based on TBI data

showing the start time of each trip. Subject to the limits imposed by the four-step modeling

process, the more such slices, the more accurate are the resulting congestion estimates. As the

level of detail of congestion forecasts required for both facility design projects and air quality

modeling in the Denver region demands a high degree of accuracy, Compass subdivides daily

trips into ten different periods of the day.

Network Assignment

Automobile trips are assigned to the highway network via a “user equilibrium” algorithm, after

commercial trips have been loaded first using an “all-or-nothing process.” The all or nothing

process simply assigns trips to the shortest path between origin and destination, ignoring possible

congestion effects that might cause trips to take different paths. The user equilibrium process

assigns the trips between each origin and each destination TAZ in such a way that, at the end of

the process, no trip can reduce its travel time by changing its path. In other words, taking into

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account the congestion produced by all other trips in the region, each trip is following its minimum

path. High-occupancy vehicles (HOV) are loaded simultaneously with single-occupant vehicles

(SOV). Transit assignment is performed separately, using an all-or-nothing algorithm that does

not take into account the possibility that high demand on some transit routes may motivate some

riders to shift routes. Finally, the model is run several times, feeding back the output speeds to

the input stages that require them as input (among them, the trip distribution stage) until the

output speeds and the input speeds match. The model also takes into account the effect of toll

costs in roadway route choice by converting toll costs into equivalent time cost using an estimated

value of time for automobile trip-makers. The most recent version of Compass includes

adjustments to the highway value of time, and to the approach to calculating generalized cost of

automobile operation, to improve the model’s ability to match counted volumes on toll facilities,

particularly E-470.

Model Calibration

As part of the IRM Refresh Phase, an extensive model calibration and validation process was

undertaken, to ensure that the model was able to reproduce observed travel for the base year of

1997, and that it also was able to reproduce observed travel in a later year for which data was

available (2001). The model was calibrated to the 1997 data, as that was the year in which the

household travel data was collected, and validated for the year 2001. In the calibration process,

model parameters estimated using the TBI travel survey data are adjusted to match observed

transit and highway counts. Since the 2006 Cycle 2 Conformity Cycle, there has been some

small-scale recalibration of the transit model. In the validation process, this same model was run

for the year 2001, to assess its ability to successfully match observed data for another year. The

following data were used in the calibration and validation process:

Approximately 1,300 traffic counts (1997 and 2001 combined).

Total transit ridership for all bus and rail lines for both 1997 and 2001.

“Spot” transit ridership (at particular points on a given transit line) for approximately 12

screenlines.

Daily vehicle counts at all park-n-Ride lots in the region.

Address locations for all vehicles parked at the principal park-n-Ride lots on the Southwest

Corridor LRT line.

Trip purpose and origin-destination data for Southwest Corridor LRT line riders.

Speed observations taken at 114 locations in the region, during seven periods of the day.

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The traffic counts were used to compare modeled to observed roadway volumes across

screenlines (long lines drawn across the region to permit comparison of sub-regional traffic flow);

across cordon lines (circles drawn around key areas such as the CBD to permit comparison of

trips into and out of the area); and for total volume and vehicle miles of travel (VMT) subdivided by

facility type and area type.

Transit counts were used in a similar manner, especially to ensure the model’s reasonable

reproduction of transit ridership by sub-model (such as rail versus bus). Speed data was used to

ensure that the model produced a reasonable approximation of speeds by facility type and area

type, at the same time as it was reproducing observed traffic volumes in those same categories.

Tables 1 and 2 show basic outcomes of vehicle miles of travel, compared to highway performance

monitoring system (HPMS) VMT estimates, and modeled speeds compared to observed speeds.

Note that the VMT totals in Table 2 reflect the fact that DRCOG has counts for only a subset of

roadway segments in the system, whereas the HPMS attempts to estimate VMT for all system

segments.

Appendix B Table 1

2001 Validation Year: Observed versus Modeled Average Speeds Period Modeled (mph) Observed (mph) AM Peak 39 37

Average Midday 47 50

Appendix B Table 2

2001 Validation Year: Observed versus Modeled Vehicle Miles of Travel Modeled Observed Percent Difference HPMS VMT 54.8 million 55.2 million -0.7%

VMT on links with counts in DRCOG database

19.4 million 18.6 million 4.3%

The following general conclusions may be drawn from these outcomes:

While speed outcomes are not perfect, the model quite closely matches observed speeds,

with the model being slightly faster than observations in the AM peak, and slightly slower

than observations in the Midday.

While it is typical that the model results fall somewhere between VMT totals implied by the

HPMS and by DRCOG ‘s counts, DRCOG has calibrated the model so that it “errs on the

high side;” that is to say, that it’s apparent error is to overestimate the counted VMT, rather

than to underestimate the HPMS VMT to any significant extent. In this case, the balance

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point that DRCOG felt appropriate underestimates HPMS VMT slightly, but the

accompanying level of overestimation of counted VMT led DRCOG to the conclusion that

the final level of VMT was in fact conservative. In this way, DRCOG ensures that air quality

evaluation performed using the model is conservative (based on VMT that is more likely to

be overestimated than underestimated.)

Air Quality Modeling

Formal air pollutant emissions modeling is conducted by the APCD. However, DRCOG, the

APCD, and other agencies work closely together in this effort, both in developing the modeling

techniques, assumptions, and parameters, and in executing the model runs. Travel model results

are, of course, one of the principal inputs to the air pollutant emissions model. The model

produces estimates of the amount of emissions of carbon monoxide (CO), volatile organic

compounds (VOCs), oxides of nitrogen (NOx), and particulate matter (PM10) generated by motor

vehicles. The results are then combined with numerous assumptions concerning meteorology

and atmospheric chemical reactions to produce air pollutant concentration estimates.

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APPENDIX C

PM10 STREET EMISSIONS REDUCTION COMMITMENTS

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APPENDIX D U.S. DEPARTMENT OF TRANSPORTATION CONFORMITY FINDING

(TO BE PROVIDED)

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(intentially blank)

APPENDIX E

LIST OF ACRONYMS

ACT Agency Coordination Team APCD Air Pollution Control Division AQCC Air Quality Control Commission BNSFRR Burlington Northern Santa Fe Railroad CAMP Continuous Air Monitoring Project CDOT Colorado Department Of Transportation CMAQ Congestion Mitigation Air Quality CO Carbon Monoxide DRCOG Denver Regional Council Of Governments EPA United States Environmental Protection Agency FHWA Federal Highway Administration FTA Federal Transit Administration HOT High-Occupancy Toll HOV High-Occupancy Vehicle MPO Metropolitan Planning Organization MVRTP Metro Vision Regional Transportation Plan NAAQS National Ambient Air Quality Standards NO Nitrogen Oxide PM Particulate Matter Ppm Parts per Million RAQC Regional Air Quality Council RTD Regional Transportation District RTP Regional Transportation Plan SIP State Implementation Plan TCM Transportation Control Measures TDM Transportation Demand Management TIP Transportation Improvement Program TMA Transportation Management Area TMO Transportation Management Organization TSSIP Traffic Signal System Improvement Program VOC Volatile Organic Compounds

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Documents

2008 Amendment Cycle 2 DRCOG Conformity Determination Conformity Determinati… · iii ABSTRACT . TITLE: 2008 Amendment Cycle 2 DRCOG Conformity Determination (CO, PM 10, and 1-hour