Common use of Traffic Queue Length Clause in Contracts

Traffic Queue Length. A major concern about a TSP system is whether a TSP treatment will cause excessive delay for other intersection movements. To address this concern, a key MOE is the size of the traffic queue for each conflicting phase and the delays associated with those queues. Before and after analysis of traffic queue lengths can help answer whether queues significantly lengthen for movements not receiving the benefits of TSP treatments. Also, it helps understand TSP impacts on streets crossing the TSP corridors. In this study we manually collected sample traffic queue length data from recorded video images at TSP-enabled intersections within the SS-RTSP project. Signal cycle failures refer to the specific delay condition in which vehicles must sit through at least one complete signal cycle to pass through an intersection. This condition leads to considerable public frustration, and an increased occurrence of such failures is likely to result in more substantial “public resistance” to TSP than will a minor increase in intersection delay. Thus, it is a key measure reported to public officials. Signal cycle failures were extracted manually from recorded video data.