TRAFFIC SIGNAL WARRANTS
The adequacy of the existing warrants and the need for revised or additional warrants in meeting current needs for determining whether a traffic signal should be installed were evaluated. The research effort included a state-of-the-art review and survey of current practices, empirical studies of traffic operations at intersections using time-lapse photographic techniques, acquisition and statistical analysis of a large data base describing accidents at intersections, design and implementation of a large-scale traffic simulation study, development and implementation of analytical models, synthesis of results and specification of recommended traffic signal warrants, design and distribution of a pilot warrant evaluation survey and subsequent refinement of recommended warrants, and preparation of a study design for field verification of the recommended warrants. The results of the studies are briefly outlined. Ten warrants were recommended. These warrants relate to: vehicular volume, peak-hour volume, hazard volume, delay, pedestrian volume, school crossing, accident experience, systems, and downgrading.
- Digital Copy:
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Lieberman, E B
- King, G F
- Goldblatt, R B
- Publication Date: 1977
Media Info
- Features: Tables;
- Pagination: p. 151-154
- Monograph Title: SUMMARY OF PROGRESS THROUGH 1977 (NCHRP)
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Serial:
- NCHRP Summary of Progress
- Publisher: Transportation Research Board
Subject/Index Terms
- TRT Terms: Highway operations; Signalized intersections; State of the art studies; Statistics; Time lapse photography; Traffic; Traffic signs; Warrants (Traffic control devices)
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00170825
- Record Type: Publication
- Report/Paper Numbers: Project 3-20-Fy'73
- Files: TRIS, TRB
- Created Date: Jul 19 1978 12:00AM