Traffic Data Management on Large-Scale Projects€¦ · I-66 Eastbound Shoulder Lane Open. I-66...
Transcript of Traffic Data Management on Large-Scale Projects€¦ · I-66 Eastbound Shoulder Lane Open. I-66...
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www.jacobs.com | worldwide
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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Safety Moment
June is National Safety Month
Focus of reducing leading causes of injury and death, all around us and at all times
Be vigilant of your surroundings, especially while on phone
For more, please visit National Safety Council at https://www.nsc.org/work-safety/get-involved/national-safety-month
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Agenda
3
Why
What
WhereWhen
How
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Why
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• 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
2018 VASITE Annual Meeting
What
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Where
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• 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
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I-66 Outside The Beltway (OTB)
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We started with…
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HOV-2: 5:30am – 9:30amShoulder: 5:30am – 11:00am
HOV-2: 3:00pm – 7:00pmShoulder: 2:00pm – 8:00pm
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We went through…
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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
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To get to…
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Source: http://outside.transform66.org/
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When
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Throughout the preliminary engineering stage…
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Let’s see How…
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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
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I-66 Network• Freeway length ~ 35 miles • Interchanges ~ 19• Arterial ramps ~ 175• Arterial Intersections ~ 75
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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
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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
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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
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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
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Throughout the preliminary engineering stage…
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ENvironmental TRaffic DAta (ENTRADA)
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• 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)
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ENTRADA to reflect I-66 complexity
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Over 300 input data entries per segment
1 segment = 1 ENTRADA file
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ENTRADA – Inputs and Outputs
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Data Management Process for ENTRADA
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ENTRADA Files
Segmentation Database
Geometric Roadway Information
Volume Information
Roadway Operations Information
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A Typical Freeway Segmentation
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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)
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Segmentation - Nomenclature
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Each of the “common” segmentation is
assigned a unique 7-9 digit ID number.
F G E 066 234 06
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Database Setup
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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.
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Data Compilation
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Each scenario worksheet contains the information needed for each category. Geometric Roadway, Roadway Operations, and Volumes are next to each other.
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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
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Stats per Scenario
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• 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
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Data Management Process for ENTRADA
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ENTRADA Files
Segmentation Database
Geometric Roadway Information
Volume Information
Roadway Operations Information
Automation
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CH2M/Jacobs Automation Tool
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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
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Savings…
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132 hours
5 min
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Throughout the preliminary engineering stage…
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Data Management – Other Applications
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Persons Moved
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Data Management – Other Applications
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Mode Share
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Data Management – Other Applications
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Hours of Congestion
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www.jacobs.com | worldwideOctober 17, 2018© Copyright Jacobs
Questions / Discussions [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