An analysis of intersection traffic signal warrants
Abstract
This paper presents an analysis of the existing traffic signalwarrants and the cmresponding threshold values. The analysisof unsignalized intersections was conducted according to theanalytical procedures of Highway capacity manual. Traffic signaloptimization was conducted using Synchro software. Theresults showed that the cun-ent wan·ants are not sufficiently reliablein some situations and can be misleading in the process ofselecting the intersection control type. There are three majorreasons for insufficient reliability of the existing wan·ants. First,they are p1imarily based on total major and subject minor streetvolumes, so they do not take into account all the possible combinationsof volume distribution and composition of the turningmaneuvers. Second, they do not make difference betweenthree-leg T intersections and four-leg intersections, and finallythey are based only on an overall system operation without regm·ding the functionality of a specific approach.References
Manual of uniform traffic control devices-Millennium
edition. United States, Department of transportation,
Washington D. C., 2000.
Traffic Engineering Handbook. Institute of Transportation
Engineers, Prentice-Hall USA, 1991.
Highway Capacity Manual (HCM 2000), Transportation
Research Board, Washington DC, 2000.
(4] Ardekani, A. and Wiliams, P. E. Impacts of traffic signal
installation at marginally warranted intersections. Reporl
No: FHWA/TX-94!1350-ZF. Texas Department of
Transportation, Center for Transportation Studies Civil
Engineering department. University of Texas at Arlington,
(5] Saka, A. A. Microscopic simulation modeling of minimum
thresholds warranting intersection signalization.
Transportation research record, Issue 1421 Washington
D. C., 1993, pp. 30-35
(6] Wainwright, W. S. Will Newly Improved Warrants Result
in More signals? ITE Journal, Vol. 55 No: 12, 1985, pp.
-30.
Neudortf, L. G. Gap Based Criteria for Signal warrants.
ITE Journal, 1985, pp 15-18.
Bretherton, W. M. and Elhaj, M. A New Signal Wan·ant
for Practicing Traffic Engineers- Turning Conflicts. 64
ITE annual meeting. Washington D. C., pp. 37-42.
Sampson, J. D. Queue based traffic signal wmrants. ITE
Journal, Vol. 61, No. 7, Washington D. C., 1996, pp.
-36.
Marek, J. F., Kyte, M., Zongzhong, T., Lall, K., Voigt,
K. Determining intersection traffic control using the 1994
Highway Capacity Manual. ITE Journal (Institute of
Transportation Engineers), Volume 67, Issue 12, 1997,
pp. 22-26.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
