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NCHRP 3-70 Multimodal LOS for Urban Streets

Research Objective. To develop and test enhanced methods for determining levels of service for automobile, transit, bicycle, and pedestrian modes on urban streets, in particular with respect to the interaction among the modes. . Research Status. Tasks Completed1. LOS Framework2. Phase II Data Col

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NCHRP 3-70 Multimodal LOS for Urban Streets

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    1. NCHRP 3-70 Multimodal LOS for Urban Streets Richard Dowling, Aimee Flannery, Nagui Rouphail, Paul Ryus, Bruce Landis, Theo Petritsch July 2007

    2. Research Objective To develop and test enhanced methods for determining levels of service for automobile, transit, bicycle, and pedestrian modes on urban streets, in particular with respect to the interaction among the modes.

    3. Research Status Tasks Completed 1. LOS Framework 2. Phase II Data Collect 3. Develop LOS Models 4. Interim Report 5-7. HCM Chapter, Software, Probs. 9. HCQS Presentations Tasks To Do 8. Final Report (Sep. 2007)

    4. Data Collection Auto/Bike/Ped Video Labs - 4 cities. Transit On-Board Surveys – 4 cities.

    5. Model Development Statistical Analysis Regression, Maximum Likelihood Selection of Variables Calibration of Parameters Result: Best Models to Fit Data Model Refinement Adapt models to meet needs of Agencies Produce single letter grade LOS Produce LOS A-F

    6. Auto LOS Model

    7. Model Estimates Range of LOS

    8. What is LOS of a Distribution?

    9. Transit LOS Model

    10. Bicycle LOS Model SegLOS = Segment bicycle LOS IntLOS = Intersection bicycle LOS Conflt = Driveway conflicts per mile C = constant

    11. Pedestrian LOS Model Ped Density LOS per HCM Ped Art LOS Interaction of peds with traffic.

    12. Pedestrian Art LOS Model SegLOS = Ped segment LOS IntLOS = Ped Intersection LOS C = constant Midblock = midblock crossing factor

    13. Current HCM Urban St. LOS Auto = Speed by arterial class Transit = Frequency, speed, reliability Bicycle = Speed Pedestrian = Speed

    14. Validity of HCM : NCHRP 3-70

    15. Special Features Chapter 15a The abuse of LOS Placeholders for performance computation (or links to other chapters?) Advice for special cases When to use alternate tools Accuracy & sensitivity Software validation data set Design Aids

    16. Next Steps Give Comments to Urban Streets Subcommittee (Janice Daniel) or me. Video Lab Demo – Monday Software Demo – Monday Final Report – September 2007 Revised chapter – January 2008

    17. Issues Why Not Speed for Auto? Others

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