An Evaluation of Signalized Intersection System Analysis Techniques

A system of signalized intersections is a critical element in the smooth operation of both arterial and urban street facilities. The amount of vehicular and pedestrian traffic which can be processed by a system of intersections depend on a) characteristics of the traffic and pedestrian stream, b) traffic control measures, c) various physical and operating characteristics of the roadway and d) the environmental conditions which have a bearing on the experience and actions of the driver. Because many such factors influence interrupted flow through a system of intersections, it is important that the best technique be utilized for analyzing a system of intersections. A system of signalized intersections is defined as two or more signalized intersections that are closely spaced (under 1500’) together. Intersection systems not only control, to a large extent, the capability of major and secondary arterial streets to accommodate the flow of traffic and pedestrians in an urban area, but they also may seriously affect or limit the ability of nearby freeways to perform at maximum efficiency. The system of signalized intersections selected for this study provide an ideal representation of this operational scenario.