A TECHNIQUE FOR MEASUREMENT OF DELAY AT INTERSECTIONS. VOLUME 1. TECHNICAL REPORT
Findings are presented relating to the design of a simple yet accurate technique for measurement of vehicular delay on the approach to a signalized intersection. Precise definitions were established for four measures of performance; stopped delay, time in queue delay, approach delay, and percent of vehicles stopping. Approach delay was selected as being the most representative of intersection efficiency. Four manual methods were tested in the laboratory using film taken at 10 intersections. The values thus obtained were statistically compared with true values from time-lapse photography. The point sample, stopped delay procedure, and the percent of vehicles stopping method were selected as the most promising methods for practical use and were performed in the field at three sites. A User's Manual for application of these two methods was produced. Interrelationships between the four measures of performance were established such that approach delay could be estimated from a value for stopped delay.
JHK & Associates,
Washington, DC USA 20590
- Reilly, W R
- GARDNER, C C
- Kell, J H
- Publication Date: 1976-11
- Pagination: 171 p.
- TRT Terms: Highway traffic control; Intersections; Manuals; Measurement; Photographic materials; Queuing; Signalized intersections; Statistical analysis; Stopped time delays; Time lapse photography; Traffic delays; Traffic signals
- Old TRIS Terms: Photographic film
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;
- Accession Number: 00154790
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FHWA-RD-76-135 Final Rpt.
- Contract Numbers: DOT-FH-11-8836
- Files: NTIS, TRIS, USDOT
- Created Date: Jun 17 1977 12:00AM