PERFORMANCE EVALUATION OF CONSECUTIVE SIGNALIZED INTERSECTIONS UNDER HETEROGENEOUS TRAFFIC CONDITIONS IN CAIRO, EGYPT

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This article highlights the operational performance evaluation of consecutive signalized intersections under heterogeneous traffic conditions. It investigates the impacts of such traffic conditions, as a dominant operation in developing cities, on a set of four signalized intersections located in an urban arterial corridor in Cairo, Egypt. Therefore, the influences of complexities due to the heterogeneity in traffic operation including the diverse static and dynamic properties of vehicles, aggressive drivers' behavior and the lack of lane discipline were investigated. To accomplish this research objective, PTV-VISSIM, as a microsimulation environment was employed to analyze and estimate the Level of Service (LOS) of the studied intersections. To represent the studied intersections as indisputable as the reality, special attention was given to calibrating and validating different simulation parameters. The results emphasized the significant impact of the heterogeneous traffic conditions on the studied intersections, especially under heavy traffic conditions during peak hours. The intersections throughputs, delays, discharge rates and the total travel time was dramatically impacted. This study recommends the necessity of deployments new innovative schemes, in which the operational performance of the existing conventional intersections could be enhanced. Unconventional intersection designs as a viable interstation treatment could be proposed to alleviate congestions.

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