Adaptive Signal Control IV: Evaluation of the Adaptive Traffic Control System in Park City, Utah

University Transportation Centers Program2006PDFTech ReportMartin, Peter T.Stevanovic, AleksanderUniversity of Utah. Department of Civil and Environmental EngineeringUnited States. Department of Transportation. University Transportation Centers (UTC) ProgramUniversity of Utah. Dept. of Civil and Environmental EngineeringUtahArterial highwaysData collectionHighway traffic controlMeasures of effectivenessSignalized intersectionsSpeedStopped time delaysTraffic flowTraffic simulationTravel demandTravel timeMPC Report No. 06-182The purpose of this project is to evaluate the effectiveness of the future Utah Department of Transportation (UDOT) adaptive traffic control system (ATCS) on an arterial street network in Park City, Utah, that experiences both everyday and unpredictable changes in traffic flow. The two goals of this project are to assess the effectiveness of the future UDOT ATCS relative to the existing traffic control system and to assess the transfer of ATCS expertise from a vendor to UDOT personnel. This report contains the planned methodology for the project and the results from the \u201cbefore\u201d evaluation of the system. The proposed measures of effectiveness (stopped delay, corridor travel time, average speed, number of stops, cycle length, traffic demand) for the ATCS evaluation, the collection method for each, and their application range are listed. The data collection was done during three weeks in August before the start of the school season in Park City during the weekday peak and off peak periods on Tuesdays, Wednesdays, and Thursdays, under fair weather and dry pavement conditions. Stopped-time delay studies assess the influence of the ATCS system on stopped-time delay and stops at all 12 signalized intersections. Turning movement counts are used to relate relevant stopped delay studies with concurrent traffic demand at the intersections and also as inputs for traffic simulation runs. The results in this report represent measures of effectiveness from the traffic data collection before the ATCS is installed.127