An analysis of intersection traffic signal warrants

  • Dražen Cvitanić
  • Deana Breški
Keywords: traffic signal wanants, intersection delay, traffic volume distribution, four-leg intersections, T intersections


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.


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.


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.


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.

How to Cite
Cvitanić D, Breški D. An analysis of intersection traffic signal warrants. PROMET [Internet]. 1 [cited 2019Aug.20];17(1):25-2. Available from:
Older issues