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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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1. NCHRP 3-70Multimodal 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