Reston Network Analysis: Transportation Advisory Commission: July 19, 2016

County of Fairfax, Virginia

Reston Network Analysis

Transportation Advisory CommissionJuly 19, 2016

Kristin CalkinsFairfax County Department of Transportation


Purpose of Study• Conduct a detailed analysis of the grid of streets and

determine– A finalized grid of streets– Number of lanes between and at intersections– How to best accommodate transit, bikes, and pedestrians– Right-of-way needs

• Assign urban street types and modal emphasis based on the Urban Street Standards from the Department of Rail and Public Transportation

Department of Transportation 2



Study Area


How we got here:Reston Phase I Plan Amendment



Need for Study


• The Reston Phase I Comprehensive Plan Amendment was adopted by the Fairfax County Board of Supervisors on February 11, 2014.

• The Board follow-on motion from the adoption directed staff to: “conduct a detailed evaluation and operational analysis of the enhanced street network shown on the Reston Master Plan, prioritize these improvements, and develop an implementation strategy.”


Need for Study (Cont.)Follow-on Study to the Reston Phase I Plan Amendment



Reston Phase I Plan AmendmentTransportation Recommendations


• Maintain a Balance between land use and transportation• Ensure pedestrian mobility throughout the TSAs• Bike Master Plan for County has been adopted and

includes the TSAs• An enhanced RIBS and Fairfax Connector service to

support rail• Strong Transportation Demand Management (TDM)

program in the TSAs


Reston Phase I Plan AmendmentMajor Road Transportation Recommendations


• An enhanced street network to increase connectivity– Developed by the Reston Task

Force• Soapstone Drive Overpass• Town Center Parkway

Underpass • South Lakes Drive Overpass• Grade Separate Fairfax

County Parkway/Sunrise Valley Drive



Reston Phase I Plan AmendmentGrid of Streets


Reston Network Analysis


Data Collection• Traffic

Counts in June 2015

• Travel Time Runs

Existing Conditions• Capacity

Analysis • Level of

Service

Test Grid of Streets (2030 & 2050)• Traffic

Forecasting Capacity Analysis

• Level of Service

Mitigation• Signal re-

timing• New links• Turn lanes• Additional

lanes

Roadway Classification• DRPT Design

Guidelines• Bike lanes• Sidewalks/

Pedestrian routes

• On-Street Parking

• Transit Routes

Finalize Grid of Streets (2030 & 2050) Based on:• Advisory

Group input• Stakeholder

input• Community

input

Phasing Analysis• Prioritizatio

n of larger projects

Network Analysis Project Process

Advisory Group input, Stakeholder input, Community input


Transit Oriented Development• Mixed-use walkable

development around Metrorail Stations

• Supported by strong Transportation Demand Management (TDM) program• Enhanced pedestrian facilities• Increased transit ridership• More bike parking and access• Encourages carpooling• Teleworking


Development2050 Peak Hour – Future Trips0 to ¼ Mile

¼ to ½ Mile

Beyond ½ Mile

Office 45% 40% 35%

Residential 45% 40% 25%Technological Advancement

7.5% 7.5% 7.5%

TDM Vehicle Trip Reduction Goals

Reductions based off of ITE Trip Generation Rates


Evaluating the Grid• Level of Service and Delay at Intersections

• LOS E (55 – 80 seconds of delay) is the standard for the Reston Transit Station Areas

• VDOT and FCDOT have agreed on LOS E as the standard for the Reston Transit Station Areas

• Queue Length (number of cars waiting at a signal)• Walksheds – pedestrian accessibility• Enhanced connectivity for transit



Walksheds


Map 1: 2015 Walkshed

2015 Walkshed 2050 Walkshed


Mitigation



Purpose of Mitigation• Mitigation reduces vehicle congestion • Mitigation reduces delays experienced at

intersections• Mitigation improves the reliability of travel times

through an area (for both buses and vehicles)• Mitigation will be the way we achieve LOS E in the

Transit Station Areas• We are using mitigation measures that have the

lowest impact



Mitigation Options• Mitigation Measures - Tiered Approach

– 1st Tier: No right of way (ROW) impact – 2nd Tier: Some right of way impact– 3rd Tier: Large scale mitigations if needed

– Consultation with Advisory Group, Stakeholders, and citizens

• Each grid link is initially assumed to be one lane in each direction

– No turn lanes were initially assumed at new intersections


Additional coordination will be needed with VDOT on the location of turn lanes at signalized intersections


2050 1st Tier Recommendations



2050 1st Tier Mitigation Measures

• No ROW Impact Mitigation Measures – Modifications to lane configurations– Signal timing and phasing optimization – All-way stop vs. two-way stop evaluation – Additional traffic signals

• 40 new Signalized intersections recommended



2050 2nd Tier Recommendations




Mitigation Measures2nd Tier: Some Right of Way Impact

• Potential some ROW Mitigation Measures– Signals were added where needed– Turn lanes: left and right turn lanes– Additional through lane– Additional grid link


2050 2nd Tier Intersection Control





Turn Lanes• Monroe St. & Frying Pan Rd./Fox Mill Rd. • Reston Pkwy. & Sunrise Valley Dr. • Sunset Hills Rd. &Town Center Pkwy. • Wiehle Ave. & Reston Station Blvd.• Wiehle Ave. & N Isaac Newton Sq.• Monroe St. & future connection to Herndon

Metro GarageAdditional coordination will be needed with VDOT on the

location of turn lanes at signalized intersections


2050 2nd Tier RecommendationsNew Turn Lanes


Wiehle Ave. & N. Isaac Newton Sq.- EB left turn lane & WB right turn lane

Tier 1 Tier 2

Wie

hle

Ave

.

N. Isaac Newton Sq.

Wie

hle

Ave

.

N. Isaac Newton Sq.

PM: 103 sec. PM: 65 sec.


2050 2nd Tier RecommendationsTown of Herndon Comprehensive Plan Improvements


Worldgate Dr. & Herndon Pkwy.

Monroe St. & Worldgate Dr.

Monroe St. & Herndon Pkwy.

Fairbrook Drive Extension Worldgate Drive Extension

New SignalsWorldgate Dr. Extension & Herndon Pkwy.

Herndon Pkwy. & Fairbrook Dr.


2050 2nd Tier MitigationResults



2nd Tier LOS Results• Of 42 key signalized intersections in the study area,

the following are forecast operate at Level of Service F:

27

42 Key Intersections – LOS F

Intersections2050

UnmitigatedAfter 2050

1st TierAfter 2050

2nd Tier24 13 10


2050 Problem Locations


Intersections – 120+ Seconds of Delay

Intersections2050 Unmitigated After 2050

1st TierAfter 2050

2nd Tier20 10 7

With signal re-timings and the introduction of signals, there has been a reduction in the

projected number of intersections experiencing delays in excess of 120 seconds



2050 Unmitigated Problem Locations



2050 1st Tier Problem Locations



2050 2nd Tier Problem Locations




• Unmitigated had 20 Problem Locations• After 1st Tier: 10 Problem Locations• After 2nd Tier: 7 Problem Locations

– 6 are associated with identified follow-on tasks1. Fairfax County Parkway & Spring Street 2. Fairfax County Parkway & Sunrise Valley Drive3. Reston Parkway & Baron Cameron Avenue4. Reston Parkway & Bowman Towne Drive5. Reston Parkway & Sunrise Valley Drive 6. Reston Parkway & South Lakes Drive




Fairfax County Pkwy. & Spring St.

Reston Pkwy. Capacity Improvements

Fairfax County Pkwy. & Sunrise Valley Dr.


3rd Tier Mitigation



Mitigation Measures3rd Tier: Alternative Intersection Treatment

• Median U-Turn/Superstreet– Eliminates left turn movement for side streets– Increases thru movement green time– Additional needed ROW to provide turn radius



Mitigation Measures3rd Tier: Large Mitigation Measures

• Underpass/Overpass– Provides for an uninterrupted thru movement

• Only done in close coordination with Advisory Group and Stakeholders after all other mitigation measures have not worked



Public Involvement



Process with Advisory Group• Appointed by Supervisor Hudgins• Regular meetings: Monday evenings as

scheduled• Sounding board for the project• Opportunity to hear community and property

owner opinion in dialogue• Advises staff of what community and developer

opinions on the project



Process with Stakeholders• Property Owners, traffic consultants and

interested parties in the Reston Transit Station Areas

• Regular meetings: Friday Mornings as scheduled

• Inclusive, collaborative process• Full access to information



Process with Public

• Meetings at key project milestones• Ability to comment at public meetings and

on project website• All other meetings are open to the public



Next Steps• Identify Tier 3 Mitigation Measures for:

– Fairfax County Parkway & Sunrise Valley Drive– Fairfax County Parkway & Spring Street– Reston Parkway

» Intersection improvements from Baron Cameron Avenue to Lawyers Road

• Phasing Analysis– Based on Existing Conditions– Based on 2050 Conditions

• Assign DRPT Multimodal Cross Sections • Finalize 2050 Grid• Analyze 2030 Grid



Schedule


Task Description

1A Land Use and Networks - Task is Complete

1B Traffic Counts - Task is Complete

2A Establish Existing Conditions - Task is Complete

2B Calibrate Against Existing Conditions -Task is Complete

3A2 Analyze Future Conditions (2050) - Task complete advance to Tier 3 Mitigation

3A1 Analyze Future Conditions (2030)

3B Simulation of the Dulles Toll Road

3C Microsimulation - Optional

4A Meetings/Presentations

4B Additional Meetings/Presentations - Optional

5A Phasing Analysis - Existing Conditions

5B Phasing Analysis - 2050 - Optional

6 Determination of DRPT Guidelines Roadway Classification

7 Documentation

8 Reston Parkway Capacity Improvements

9 Fairfax County Parkway & Spring Street Interchange

10 Fairfax County Parkway & Sunrise Valley Drive

11 Rock Hill Bridge at Sunrise Valley Drive

12A Meetings/Presentations

12B Additional Meetings/Presentations - Optional

October 2016April 2016 May 2016 June 2016 July 2016 August 2016 September 2016March 2016January 2016 February 2016

07/19/16


Questions & Comments

For questions and comments about the study please contact:

Kristin Calkins: [email protected](703) 877-5710

http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/



2050 2nd Tier RecommendationsNew Turn Lanes (Cont.)


Town Center Pkwy. & Sunset Hills Rd. - SB & NB left turn lanesTier 1 Tier 2

Tow

n C

ente

r P

kwy.

Sunset Hills Rd. Sunset Hills Rd.

Tow

n C

ente

r P

kwy.

AM: 106 sec.PM: 157 sec.

AM: 41 sec.PM: 40 sec.


2050 2nd Tier RecommendationsNew Turn Lanes (Cont.)


Wiehle Ave. & Reston Station Blvd.- WB left turn laneTier 1 Tier 2

Wie

hle

Ave.

Reston Station Blvd.

Wie

hle

Ave.

Reston Station Blvd.

AM WB approach: 121 sec.

AM WB approach: 60 sec.


2050 1st Tier Signal Recommendations


26 New Signalized Intersection Locations1 Sunrise Valley Dr. @ Wood Oak Dr. 14 Sunrise Valley Dr. @ Commerce Park Dr. East

2 Sunrise Valley Dr. @ Colts Brook Dr. 15 Soapstone Overpass @ Indian Ridge Rd. Extension

3 Frying Pan Rd. @ Greg Roy Ln. 16 Sunset Hills Rd. @ West of Town Center Pkwy.

4 Monroe St. @ Future Connection to Herndon Metro 17 Town Center Pkwy. @ North of Sunset Hills

5 Glade Dr. @ Pinecrest Rd. 18 Town Center Pkwy. @ Market St.

6 South Lakes Dr. @ Pinecrest Rd. 19 Sunset Hills Rd. @ Library St.

7 Sunrise Valley Dr. @ Pinecrest Rd. Extended 20 Sunset Hills Rd. @ Soapstone Overpass

8 Sunrise Valley Dr. @ Town Center Pkwy. 21 Sunset Hills Rd. @ East of Soapstone Overpass

9 Town Center Pkwy. @ North of Sunrise Valley Dr. 22 Sunset Hills Rd. @ South Lakes Overpass

10 West of Reston Pkwy. with grid street 23 Reston Station Blvd. @ Metro Center Dr.

11 Sunrise Valley Dr. @ Roland Clarke Place 24 Reston Station Blvd. @ Michael Faraday Dr.

12 Sunrise Valley Dr. @ Indian Ridge Rd. 25 Isaac Newton Square S. @ Isaac Newton Square W.

13 Sunrise Valley Dr. @ Commerce Park Dr. West 26 Wiehle Ave. @ Isaac Newton Square N.




New Signals • New Dominion Pkwy. & Library St.• Reston Station Blvd. & Soapstone Dr.• Bracknell Dr. & Stevenage Rd.• Reston Town Center West consolidated access



2050 Unmitigated LOS F



2050 1st Tier LOS F



2050 2nd Tier LOS F

News & Politics

Reston Network Analysis: Transportation Advisory Commission: July 19, 2016