Traffic Data Management on Large-Scale Projects€¦ · I-66 Eastbound Shoulder Lane Open. I-66 Eastbound HOV Lane in Operation (Outside the Beltway) I-66 EB HOV Restriction Inside

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Traffic Data Management on Large-Scale Projects

Ramgiridhar (Giri) R. Kilim, PE, PTOEShankar Natarajan, PE, PTOE

28 June 20182018 VASITE Annual Meeting, Virginia Beach

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2 2018 VASITE Annual Meeting

https://www.nsc.org/work-safety/get-involved/national-safety-month

Agenda

3

Why

What

WhereWhen

How

2018 VASITE Annual Meeting

Why

4

• Complexity• Scale• Schedule Demands• Multi-agency coordination• Multi-resolution Modeling

Needs• Seamless transfer of data at

every stage of the process• Ever-changing Design• Data Requests

• Analysis Paralysis• Scope the world for data

collection• Budget-Schedule• Need more details• Too much details• Same data, but in finer

resolution• Quick analysis-use

assumptions-don’t worry, we just need to show these results for a newspaper article


What

Where


• Northern Virginia MegaProjects GEC

• I-495 Express Lanes• I-95 HOV/HOT Lanes IJR• I-66 Corridor Improvements

– Outside The Beltway– Inside The Beltway

• Transform 66 GEC

I-66 Outside The Beltway (OTB)


We started with…


HOV-2: 5:30am – 9:30amShoulder: 5:30am – 11:00am

HOV-2: 3:00pm – 7:00pmShoulder: 2:00pm – 8:00pm

We went through…


Universe of Alternatives for Roadways and

Interchanges

Environmental DraftAlternative 2A

Environmental DraftAlternative 2B

Preferred Alternative (combination of best elements from each

alternative)

Mainline Alternatives Access Alternatives Interchange Alternatives

To get to…


Source: http://outside.transform66.org/

When


Throughout the preliminary engineering stage…


Let’s see How…

Operational Analysis Methodology

CUBE • Travel Demand Modeling

Excel • Demand Estimation

VISUM • Trip Tables and O-D

VISSIM • Microsimulation modeling

Other • Running the models and collecting outputs

Other • Process outputs to generate MOEs

I-66 Network• Freeway length ~ 35 miles • Interchanges ~ 19• Arterial ramps ~ 175• Arterial Intersections ~ 75

5:00

5:30

6:00

6:30

7:00

7:30

8:00

8:30

9:00

9:30

Pre-Peak Period Peak Period Post-Peak Period

I-66 Eastbound Shoulder Lane Open

I-66 Eastbound HOV Lane in Operation (Outside the Beltway)

I-66 EB HOV Restriction Inside the Beltway

VISSIM MOE Analysis Period

Volu

me

I-66 HOV restriction and shoulder lane operation

System Representative

Hour

Avg.

Spe

ed10

:00

Simulation Period

Analysis Period

Starting Period

Complex - Congested Corridor

Free

way

s

Post

-Pea

k Pe

riod

SOV

Trucks

HOT

HOV3+

SOV

Trucks

HOT

HOV3+

Traffic Volume Data for VISSIM Analysis

Peak

Per

iod

SOV

Trucks

HOT

HOV3+

SOV

Trucks

HOT

HOV3+

Pre-

Peak

Per

iod

SOV

Trucks

HOT

HOV3+

SOV

Trucks

HOT

HOV3+

Arte

rials

Existing AM/PM

2025 No-Build AM/PM

2025 Build AM/PM

2040 No-Build AM/PM

2040 Build AM/PM

173 Compositions/Entry Links

10 (1/2 Hr) Input Time Intervals

291 x 291 OD Matrix

3 Routing Time Intervals

Developing VISSIM Inputs and Compositions

Using VPP for Data Management

• Add/calculate fields• Filter data using SQL

(query builder)• Import/join data from

text files• Data visualization tools

– Bar charts/scatter plots– Demand vs. throughput,

speed comparisons, etc.• Export to Excel/CSV



ENvironmental TRaffic DAta (ENTRADA)


• Developed by VDOT’s Environmental Division• Air & Noise Abatement Analyses• Spreadsheet-based tool to compile geometric

and traffic data composition on Existing, No-Build, and Build and compare the results of speeds for– Every segment within the length of the corridor– Every hour of the day– Every facility (GP, CD, HOV, HOT, Ramp, Arterial)

ENTRADA to reflect I-66 complexity


Over 300 input data entries per segment

1 segment = 1 ENTRADA file

ENTRADA – Inputs and Outputs


Data Management Process for ENTRADA


ENTRADA Files

Segmentation Database

Geometric Roadway Information

Volume Information

Roadway Operations Information

A Typical Freeway Segmentation


Segmentation occurs for every Scenario, brought together by a common segmentation.

A

B

AA

CC

AAA

BBB

BB

1 (A, AA, AAA)

3 (B, CC, BBB)

2 (B, BB, AAA)

Existing No-Build Build Common Segmentation

Total 6 ENTRADA files (3 GP and 3 HOV)

Segmentation - Nomenclature


Each of the “common” segmentation is

assigned a unique 7-9 digit ID number.

F G E 066 234 06

Database Setup


The Database holds all of the information for the corridor and scenarios. There is a separate worksheet for Existing, No Build, and Build.

The Summary worksheet uses the common segmentation found on the Segment Map Reference Key worksheet to pull everything into a single

line of data for each segment.

Data Compilation


Each scenario worksheet contains the information needed for each category. Geometric Roadway, Roadway Operations, and Volumes are next to each other.


The Summary worksheet uses the common segmentation found on the Segment Map Reference Key worksheet to pull scenario information into a

single line of data.

Database Consolidation

Stats per Scenario


• 310 Freeway Segments• 90+ ramps• 125 Arterial Segments• Total 525 ENTRADA files per scenario• Approximately 175,000 data entries per scenario

Time-consuming, susceptible to human error, extensive QC needed, any re-do would be cost-prohibitive

Need for Automation

Data Management Process for ENTRADA


ENTRADA Files

Segmentation Database

Geometric Roadway Information

Volume Information

Roadway Operations Information

Automation

CH2M/Jacobs Automation Tool


A proprietary tool takes the single line of information from the Database and places it into the ENTRADA file (or files) and

summarizes calculated volume and speed information.

The user interface for the macro allows the user to choose

• the Entrada version file• the Database• location for ENTRADA files• template for output summary

Savings…


132 hours

5 min



Data Management – Other Applications


Persons Moved



Mode Share



Hours of Congestion

www.jacobs.com | worldwideOctober 17, 2018© Copyright Jacobs

Questions / Discussions [email protected]

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mailto:[email protected]

www.jacobs.com | worldwideOctober 17, 2018© Copyright Jacobs

Thank [email protected]

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Arterials crossing I-66 have 3 unique

segments for each direction of travel,

unless the number of travel lanes changes.

The largest volume value is used for each

segment.

Illustrative onlyNot to Scale

Northbound Arterial Direction of Travel

I-66 Westbound

I-66 Eastbound

3

2

1 4

5

6

Southbound Arterial Direction of Travel

North of Ramps

At the Interchange

South of Ramps

Documents

Traffic Data Management on Large-Scale Projects€¦ · I-66 Eastbound Shoulder Lane Open. I-66 Eastbound HOV Lane in Operation (Outside the Beltway) I-66 EB HOV Restriction Inside