Delay Estimation and Signal Timing Design Techniques for Multi-Stage Pedestrian Crossings and Two-Stage Bicycle Left Turns

Signalized intersections sometimes involve multistage pedestrian crossings, in which signals direct pedestrians to cross to one or more islands and then wait there for a signal to continue. There are no widely accepted methods or tools for calculating pedestrian delay at multistage crossings, and perhaps as a consequence, traffic signals governing multistage crossings are sometimes designed in a way that results in very long pedestrian delays. This paper describes a numerical method for determining crossing delay that applies to crossings of any number of stages and multiple WALK intervals per cycle. It also covers diagonal two-stage crossings and bicycle two-stage left turns, a common way of providing for cyclist turns in Europe that American cities are beginning to adopt. This method has been implemented in the freely available Northeastern University Ped & Bike Crossing Delay Calculator. The authors also describe several signal control paradigms for reducing pedestrian and bike delay at intersections with multistage crossings including short cycles, pedestrian reservice, and bidirectional bicycle crossings. The authors also show how various lead / lag phasing sequences with pedestrian overlaps can result in good progression for selected pedestrian and bicycling movements. Examples show pedestrian delay reductions of up to 95 s.

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• Supplemental Notes:
  • This paper was sponsored by TRB committee AHB25 Traffic Signal Systems.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Furth, Peter
  • Wang, Yue
  • Wang, Yue (Danny)
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References;
• Pagination: 16p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Bicycle crossings; Crosswalks; Left turns; Pedestrian movement; Signalized intersections; Traffic delays; Traffic islands; Traffic signal timing
• Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists; I73: Traffic Control;

Filing Info

• Accession Number: 01558279
• Record Type: Publication
• Report/Paper Numbers: 15-5365
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Mar 30 2015 9:35AM