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Title: DETECTOR DELAY FOR RIGHT TURN ON RED
Accession Number: 00625687
Record Type: Component
Availability: Find a library where document is available Abstract: Delayed actuation at a right-turn-on-red (RTOR) location allows a driver to turn right onto the cross street without requiring green time. This increases the efficiency of the signal and reduces delay to cross-street motorists. However, there are no analytically based guidelines to assist the traffic engineer in selecting the appropriate length of delay for RTOR applications. A questionnaire sent to city transportation departments indicated that 100% based the length of RTOR delay on engineering judgment, field observation, or both. An analytical process used to determine the appropriate values of RTOR delay is described. Equations of motion and statistical relationships are applied to the three maneuvers of an RTOR. The calculations indicate the RTOR delay settings are primarily dependent on the loop length and the traffic volume in the outside lane of the cross street. The speed of cross-street traffic also impacts the length of delay but to a lesser extent than loop length or traffic volume. The resulting guidelines for RTOR settings are based on total loop length, traffic volume in the outside lane of the cross street, and speed of the cross-street traffic. The guidelines indicate that 7 to 10 sec is appropriate for locations with low cross-street traffic volumes and 9 to 13 sec, for locations with higher cross-street traffic volumes. The higher delay values in these ranges should be used for longer loop lengths and higher cross-street speeds.
Supplemental Notes: This paper appears in Transportation Research Record No. 1360, Traffic Operations. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01405038
Language: English
Authors: Hawkins Jr, H GenePagination: p. 89-94
Publication Date: 1992
Serial: ISBN: 0309052238
Features: Figures
(4)
; References
(9)
; Tables
(8)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control
Files: TRIS, TRB
Created Date: Jan 6 1993 12:00AM
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