Corridor Management Planning in California

1
Corridor Management Planning in California

• Jeff X. Ban
• CCIT, UC-Berkeley
• Rensselaer Polytechnic Institute (RPI)

2
Overview

• Motivation for CMP
• Demo Studies in California
• Challenging Issues
• Percentile-based Methods for Performance
  Assessment and Bottleneck Calibration
• Current Progress and Expected Outcome

3
The corridor system management plan is an
evolving effort that is consistent with a
maturing transportation system
4
Motivation

• Problems of existing four-step planning process
• Static
• Can not evaluate various ITS strategies and some
  of the operational improvements
• Proposed corridor management plan
• A method that integrates detailed operational
  analysis into traditional four-step planning
  process
• Can capture detailed dynamics of the system by
  using microscopic traffic simulation
• Can evaluate both ITS strategies and operational
  improvements

5
Project Overview

• Goal
• To incorporate detailed performance measurement
  and operational analysis into the traditional
  corridor planning efforts.
• Outcome
• A template for Caltrans to use in corridor
  planning efforts that will integrate both
  planning and operations
• To help recommend the most effective improvement
  strategies.
• Major Tool
• PeMS (http//pems.eecs.berkeley.edu/Public/)
• Microscopic Traffic Simulation (Paramics)

6
Role of Micro-Simulation in CMP
Corridor Selection
Data Collection
Corridor Performance Assessment
Base-Year Simulation Model Development
Paramics
Evaluation of Future-Year Improvement Strategies
Final Recommendations
7
Demo Project I880
37 miles 157 actuated signals 25 fixed-time
signals 56 ramp meters (143 metered lanes)
8
Demo Projects SR41 I5
SR41 16 miles 99 traffic signals 15 ramp
meters I5 30 miles 96 ramp meters 120
signals (actuated)
9
Simulation Framework Development
I5 (on-going)
I880
10
SR41 Paramics Network
11
Technical Challenges

• Data Collection
• Highway PeMS
• Arterials Field Data Collection
• Data Consistency
• Representative Day
• Bottleneck Calibration in Simulation
• Percentile-Based Methods for Performance
  Assessment and Bottleneck Calibration

12
Bottleneck Calibration in Simulation

• Why Percentile-Based Method?
• Need an intelligent way to utilize available data
  (for multiple days) in the near future
• No typical or representative day for many
  congested urban corridors
• Probability of BN Occurrence

p-th percentile speed
13
Speed Contour Map
Incident
Average
15
No-Incident
50
85
14
Binary Speed Contour Maps
Observed Data
Simulation Data
Vth 35mph
Vth 35mph
Overlapping Area
Union Area
C1 90.5
15
I-880 NB Speed Contour Maps
Observed Data
Simulation Data
16
I-880 NB Binary Speed Contour Maps

• C1 24.2

Simulation Data
Observed Data
17
Current Progress (The Three studies)

• I-880
• The base year micro-simulation model development
  is completed Improvement scenario evaluation is
  near completion.
• SR-41
• The study was completed in June of 2007 A final
  report was submitted and under review.
• I-5
• The development of the base year model is
  completed Future year evaluation is underway.

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Future Year Improvements for SR-41

• Short-term (2005)
• Medium-term (2010)
• Long-term (2025)
• Long-term with HOV (2025)

19
Results of Future Year Improvements
Average Freeway Speed (PM)
20
Current Progress (Guideline Development)

• The project has been aligned with the statewide
  Corridor System Management Planning (CSMP)
  activities.
• Development of guideline template for conducting
  CSMP in general
• Development of Cookbook on what steps need to
  be performed to conduct CSMP by Caltrans
  Districts

21
Acknowledgement
22
Thank you

• Questions?
• xban_at_calccit.org