GUIDELINES FOR EXCLUSIVE/PERMISSIVE LEFT-TURN SIGNAL PHASING. FINAL REPORT

The objective of this research was to develop guidelines for the use of exclusive/permissive left-turn signal phasing. This was achieved by collecting data on traffic and roadway conditions for exclusive, exclusive/permissive, and permissive left-turn phasings and then analyzing the data to identify relationships between the left-turn phasings and traffic and roadway conditions. The guidelines addressed the following: (1) volume guidelines based on peak hour minimum left-turn volume and the product of the peak hour left-turn and opposing volumes, (2) annual left-turn accident experience, (3) left-turn traffic conflict experience based on critical number and rates, (4) left-turn delay, and (5) site condition factors identified in the study.

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• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/19067
• Corporate Authors:

  Virginia Highway and Transportation Research Council

  Charlottesville, VA  United States 

  Virginia Department of Highways

  Traffic and Planning Division, 1221 East Broad Street
  Richmond, VA  United States  23219

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Cottrell Jr, B H
• Publication Date: 1985-1

Media Info

• Pagination: 81 p.

Subject/Index Terms

• TRT Terms: Crash rates; Data collection; Exclusive permissive phasing; Exclusive phasing; Guidelines; Left turn phase; Peak periods; Permissive phasing; Traffic conflicts; Traffic delays; Traffic volume
• Old TRIS Terms: Left turn phasing
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00462288
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA/VA-85/19, VHTRC 85-R19
• Contract Numbers: 2058
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Feb 28 1987 12:00AM