A STUDY OF CLEARANCE INTERVALS, FLASHING OPERATION, AND LEFT-TURN PHASING AT TRAFFIC SIGNALS. VOLUME 2. CLEARANCE INTERVALS

This volume describes a study to develop recommendations for two questions regarding clearance intervals: (1) should a uniform yellow interval be used throughout a metropolitan area, and (2) when should all-red clearance intervals be used and how long should they be. The study procedures include a literature review, a review of state laws, questionnaires to public officials and to drivers, analytical models of traffic flow, and field studies. The uniform yellow was found not to be particularly beneficial.

  • Supplemental Notes:
    • See also Volume 1, PB81-105587 and Volume 3, PB81-105603 Also available in set of 4 reports PC E17, PB81-105579.
  • Corporate Authors:

    TJKM Transportation Consultants

    710 South Broadway Suite 302
    Walnut Creek, CA  United States  94596

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Benioff, B
    • Dock, F C
    • Carson, C
  • Publication Date: 1980-5

Media Info

  • Pagination: 156 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00326364
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-RD-78- 47 Final Rpt.
  • Contract Numbers: DOT-FH-11-8783
  • Files: NTIS, TRIS, USDOT
  • Created Date: Dec 30 1981 12:00AM