Journal Published Online: 01 February 2019
Volume 47, Issue 2

Implementing the Equilibrium of Probabilities to Measure Critical Gap at Priority Junctions



This article was carried out to implement the equilibrium method for the estimation of the magnitudes of critical gaps at priority junctions in Malaysia. This technique is dependent on the macroscopic probability equilibrium of the rejected and approved gaps. Accordingly, 18 hours of data from two junctions (i.e., from 9:00 a.m. until 6:00 p.m.) were collected using a video camera technique. The values of critical gap were estimated for three turning movements, and it was compared by the method of the Troutbeck and Malaysia Highway Capacity Manual (MHCM). The values of critical gap using equilibrium method (with max rejected gaps) provide comparable outcomes with deviations smaller than 0.20 s as those from Troutbeck’s method. A comparative analysis was performed between the results of the equilibrium method and the MHCM with deviations less than 0.40 s. It was clearly indicated that this technique can also be utilized to calculate critical gap value in Malaysia, which is within the proximity of the MHCM’s and Troutbeck’s timings.

Author Information

Sahraei, Mohammad Ali
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia, Johor, Skudai, Malaysia
Akbari, Elnaz
Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam
Pages: 13
Price: $25.00
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Stock #: JTE20180611
ISSN: 0090-3973
DOI: 10.1520/JTE20180611