Hybrid Delay Models for Unsaturated Two-Way Stop Controlled Intersections
Publication: Journal of Transportation Engineering
Volume 125, Issue 4
Abstract
A new methodology for modeling delay at undersaturated two-way stop controlled intersections was developed. Total delay was divided into service delay and queue delay. Empirical models were developed to estimate service delay as functions of conflicting traffic volumes, and variance of service delay as a function of conflicting traffic volumes and the average service delay. These models were used as inputs to the Markovian (random) arrivals/generally distributed service times/one server model to estimate the queue delay. The Markovian (random) arrivals/generally distributed service times/one server model provided significantly better queue delay estimates than the Markovian (random) arrivals/Markovian service rate/one server model. The models were built based on 28 h of field data from eight intersections. The total delay model was also tested using data from another location. The proposed models estimate delays that are closer to the field data than the 1994 Highway Capacity Manual delay model. The new models are for unsaturated two-lane two-way approaches with random patterns and a major street speed limit of 48 km/h (30 mph).
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Al-Omari, B. H. ( 1996). “Delay models for intersections controlled by stop signs,” PhD thesis, University of Illinois at Urbana-Champaign, Urbana, Ill.
2.
Al-Omari, B. H., and Benekohal, R. F. ( 1997). “Delay at congested unsignalized intersections.” Traffic congestion and safety in the 21st century: Challenges, innovations, and opportunities, R. Benekohal, ed., ASCE, Reston, Va., 194–200.
3.
Hansson, A. ( 1978). “Capacity of un-signalized intersections; Swedish capacity manual.” Transp. Res. Rec. 667, Transportation Research Board, Washington, D.C., 4–11.
4.
Kyte, M., Clemow, C., Mahfood, N., Lall, B. K., and Khisty, C. J. ( 1990). “Capacity and delay characteristics of two way stop-controlled intersections.” Transp. Res. Rec. 1320, Transportation Research Board, Washington, D.C. 160–167.
5.
Lu, J., and Lall, B. ( 1995). “Empirical models for traffic delay and capacity characteristics at two-way stop-controlled intersections.” Transp. Res. Rec. 1495, Transportation Research Board, Washington, D.C., 49–56.
6.
Madanat, S. M., Cassidy, M. J., and Wang, M. (1994). “Probabilistic delay model at stop controlled intersection.”J. Transp. Engrg., ASCE, 120(1), 21–36.
7.
Ravindran, A. D., Phillips, D. T., and Solberg, J. J. ( 1987). Operations research; principles and practice, 2nd Ed., Wiley, New York.
8.
Surti, V. H. ( 1970). “Operational efficiency evaluation of selected at-grade intersections.” Hwy. Res. Rec. 321, National Research Council, Washington, D.C., 60–73.
9.
Tanner, J. C. ( 1953). “A problem of interference between two queues.” Biometrica, 40, 58–69.
10.
Tanner, J. C. ( 1962). “A theoretical analysis of delays at an uncontrolled intersection.” Biometrica, 49, 163–170.
11.
Transportation Research Board. ( 1985). “Highway capacity manual.” Spec. Rep. 209, 2nd Ed., Washington, D.C.
12.
Transportation Research Board. ( 1994). “Highway capacity manual.” Spec. Rep. 209, 3rd Ed., Washington, D.C.
Information & Authors
Information
Published In
History
Received: Dec 2, 1996
Published online: Jul 1, 1999
Published in print: Jul 1999
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.