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Operational Effect of Allowing Single Occupant Hybrid Vehicles into High Occupancy Vehicle Lanes

Operational Effect of Allowing Single Occupant Hybrid Vehicles into High Occupancy Vehicle Lanes. Chris Breiland Fehr & Peers Associate Lianyu Chu, Hamed Benouar California Center for Innovative Transportation (CCIT) UC Berkeley. Origins of “Hybrid-HOV” Laws.

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Operational Effect of Allowing Single Occupant Hybrid Vehicles into High Occupancy Vehicle Lanes

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  1. Operational Effect of Allowing Single Occupant Hybrid Vehicles into High Occupancy Vehicle Lanes Chris Breiland Fehr & Peers Associate Lianyu Chu, Hamed Benouar California Center for Innovative Transportation (CCIT) UC Berkeley

  2. Origins of “Hybrid-HOV” Laws  Energy Use/Air Quality Issues  Increased Vehicle Miles Traveled  Antipathy Toward HOV Lanes  Hybrid Hype

  3. Policy Specifics • SAFETEA-LU Requirements • States can allow energy efficient, clean air SOVs in HOV lanes • No operational degradation

  4. Policy Specifics - California AB 2628 • Implemented prior to passage of SAFTEA-LU • Different definition of HOV lane degradation • Primarily density/LOS based versus speed based

  5. Select study site Build micro-simulation model Estimate SOV / HOV demand Calibrate micro-simulation model Planning model Estimate hybrid demand Hybrid Population Data Run simulation for each scenario Design scenario Policy Performance measures Compare simulation results Policy Implications Methodology

  6. Study Scenarios • Baseline: Existing Conditions • Scenario 1: Existing Hybrid Population • Scenario 2: 50,000 Hybrid Checkpoint • Scenario 3: 75,000 Hybrid Maximum • Scenario 4: Eight Percent Hybrid Share • Scenario 5: Nineteen Percent Hybrid Share

  7. Study Location • Irvine, CA • Highly Detectorized • Fairly Busy • Variety of HOV Lane Geometries Source: Google Maps

  8. Paramics Simulation Model

  9. Paramics Simulation Model

  10. Model Calibration / Validation

  11. Performance Measures • Based on California Law and Virginia HOV Task Force Report • HCM 2000 Level of Service based on density • Change in HOV lane travel time • HOV lane flow rates

  12. Results

  13. Results

  14. Conclusions • No significant degradation of HOV lane operations in study area • Flows on SB I-5 in Santa Ana reached 1515 vph • Results do not preclude degradation on other facilities in the state or country

  15. Policy Implications • Policy may be implemented without widespread HOV lane degradation • Hybrid sales strong • “Take away” problem • Virginia law set to expire on July 1, 2006 • Phase in toll lanes • Better use of HOV lanes • HOT lane • Priority-based HOV operation

  16. Questions?

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