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Corridor System Management

I-405 Corridor System Management Plan Stakeholders Kick-off Meeting September 25, 2007 System Metrics Group, Inc (SMG). Corridor System Management. 20 miles. I-110 to I-5. 18 miles. Corridor System Management. South Bay. Corridor System Management. West LA. Corridor System Management.

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Corridor System Management

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  1. I-405Corridor System Management PlanStakeholders Kick-off MeetingSeptember 25, 2007System Metrics Group, Inc (SMG)

  2. Corridor System Management 20 miles I-110 to I-5 18 miles

  3. Corridor System Management South Bay

  4. Corridor System Management West LA

  5. Corridor System Management Valley

  6. Corridor-wide Performance Focused NB-405 @Sherman Speed Flow

  7. Corridor-wide Performance Focused SB-405 @La Cienega Speed Flow

  8. Corridor-wide Performance Focused NB-405 @Culver Speed Productivity drops by 40% when speeds drop below 30 mph (2 lane equivalent). Productivity picks up when speeds are above 40 mph. Flow

  9. Corridor-wide Performance Focused NB-405 @Montana Speed Productivity drops by 30% when speeds drop below 30 mph (1.5 lane equivalent). Productivity picks up when speeds are above 40 mph. Flow

  10. Corridor-wide Performance Focused NB-405 @Mulholland Speed Productivity drops by 45% when speeds drop below 30 mph (2.5 lane equivalent). Productivity picks up when speeds are above 40 mph. Flow

  11. SB-405 @El Segundo Speed Productivity drops by 40% when speeds drop below 30 mph (1.5 lane equivalent). Productivity picks up when speeds are above 40 mph. Flow Corridor-wide Performance Focused

  12. Base Performance Assessment (PeMS, TASAS, Other) Bottleneck Identification (HICOMP, PeMS, Aerial Photographs, CHP Logs, Other) Future Planned, Performance Improvement Programmed and (Micro-Simulation, Scenarios other Regional Models) Improvements Scenario Performance Evaluation (Micro and Meso Models) Recommendations and Performance Improvement Estimates CSMP Steps • Current Corridor-wide Performance Assessment • Bottleneck Identification • Baseline Model Development and Calibration • Future Model Development and Future Performance • Improvement Scenario Development and Evaluation • Recommended Improvements

  13. CSMP Report Elements • BASELINE (2003) AND CURRENT (2007) CONDITIONS • Corridor-wide Performance Assessment • Bottleneck Identification and Causes • FUTURE YEAR (2020) MICRO-SIMULATION MODELING  • Existing Projects Under Development • Existing Programmed and Planned Projects • Team Recommended Additional Mitigation Strategies • Future Project Scenarios • PREDICTED FUTURE CONDITIONS ASSESSMENT • Scenario 1 – X • Benefit-Cost • CONCLUSIONS AND RECOMMENDATIONS • Prioritized list of existing projects by benefit-cost • New projects

  14. District 7 Detection

  15. Caltrans PeMS

  16. Reliability Productivity Safety Mobility 1. Corridor-wide Performance Assessment Performance

  17. 1. Corridor-wide Performance Assessment

  18. 1. Corridor-wide Performance Assessment Congestion Delay

  19. 1. Corridor-wide Performance Assessment Congestion Delay

  20. 1. Corridor-wide Performance Assessment 4,560,000 vehicle-hours Congestion Delay 4,470,000 vehicle-hours

  21. 1. Corridor-wide Performance Assessment Travel Time

  22. 1. Corridor-wide Performance Assessment Reliability (Travel Time Variability)

  23. 1. Corridor-wide Performance Assessment NORTHBOUND I-405 SR118 US-101 I-10 SR90 I-105 I-110 I-710 I-605 SPEED (mph)

  24. 1. Corridor-wide Performance Assessment SOUTHBOUND I-405 I-605 I-710 I-110 I-105 SR90 I-10 US-101 SR118 SPEED (mph)

  25. 1. Corridor-wide Performance Assessment CHP Reported Incidents 2003 Total NB-405 7/16/03 ~10,000-12,000 incidents/year/direction (~40/day/direction)

  26. 1. Corridor-wide Performance Assessment Caltrans TASAS Data Caltrans TASAS Data 2003 Total NB-405 7/16/03 ~2,100-2,500 collisions/year/direction

  27. 1. Corridor-wide Performance Assessment CHP Reported Incidents 7/16/03 2003 Total SB-405 ~10,000-12,000 incidents/year/direction (~40/day/direction)

  28. 1. Corridor-wide Performance Assessment Caltrans TASAS Data 7/16/03 2003 Total SB-405 ~10,000-12,000 incidents/year/direction (~40/day/direction)

  29. 2. Bottleneck Identification NORTHBOUND I-405 SR118 US-101 I-10 SR90 I-105 I-110 Rosecrans Ave Curve Bottleneck I-710 I-605 SPEED (mph)

  30. 3.-4. Base and Future Model Microscopic simulation: • a software tool to model traffic system, including roads, drivers, and vehicles, in fine details. Micro-simulation models • PARAMICS, VISSIM, AIMSUN2, CORSIM, MITSIM … Micro-simulation applications • Evaluate traffic flow and performance improvements for multiple investment types, including expansion, operational improvements, and ITS • Develop and evaluate new traffic models, algorithms, control strategies I-5 Orange County I-405 Network

  31. 5. Improvement Scenarios Existing Bottlenecks and Potential Solutions

  32. 5. Improvement Scenarios Existing Projects for Future Improvements

  33. 5. Improvement Scenarios

  34. 6. Recommendations Short to Medium Range • Transportation Management Systems • Intelligent Transportation Systems • Transit Systems • Operational Improvements (aux lanes, ramps) • Maintenance (pavement) • Arterials Long Range • Operational Improvements • Capital Improvements (interchanges) • Expansion (freeway, transit, arterials)

  35. Example of Recommended Improvements Transportation Management System • Widen ramps (increase storage) • Convert HOV bypass lanes to metered lanes • Connector metering (reduce demand) • Central control adaptive ramp metering (SWARM) Operational Improvements • Auxiliary lanes • Minor geometric modifications • Interchange modifications • Arterial connections/transitions

  36. So What? SB-405 @El Segundo Speed Productivity drops by 40% when speeds drop below 30 mph (1.5 lane equivalent). Productivity picks up when speeds are above 40 mph. Flow 2000 more cars on the freeway will mean 2000 less on arterials (Sepulveda)

  37. PROJECT DISCUSSION • 2003 Baseline Year • Summer of 2003 – begin HOV lane construction • 105 to 90 completed and open to traffic • 90 to 10 currently under construction • SB-Sunset to 10 currently under construction • Detection gap (2005 to 2007) • Micro-simulation Model • PARAMICS Model • Separate out into 2 sections (5 to 10, 10 to 110) • Data needs and collection • Budget constraints

  38. STAKEHOLDERS Stakeholders Role • Local issues and concerns • Relevant existing studies to consider • Simulation modeling input • Data resources • Review results How • Follow-up workshops

  39. Contact info:Philip Law, SCAG – law@scag.ca.gov, 213-236-1841Elhami Nasr, Caltrans – elhami_nasr@dot.ca.gov, 213-897-0227Tom Choe, SMG – tom_choe@sysmetgroup.com, 213-382-6875

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