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.

18. 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@calccit.org