Evaluation of Transit Signal Priority Using Observed and Simulated Data
Document Type
Journal Article
Publication Date
2009
Subject Area
operations - traffic, infrastructure - bus/tram priority, infrastructure - bus/tram priority, infrastructure - traffic signals, economics - appraisal/evaluation, mode - bus
Keywords
Transit buses, Traffic simulation, Traffic signal priority systems, Traffic signal preemption, Snohomish County (Washington), Preemption (Traffic signals), Level of service, Field studies, Evaluation, Bus priority
Abstract
The South Snohomish Regional Transit System Priority (SS-RTSP) system was launched in Washington state to improve the level of service for community transit buses. This study uses field data and simulation models to quantitatively evaluate the impacts of the SS-RTSP system on both transit and local traffic operations. The evaluation results show that the SS-RTSP system produces substantial benefits to transit vehicles with insignificant negative impacts to local traffic on cross streets. Transit vehicles operated more reliably with the SS-RTSP system. Because of reduced travel time, the SS-RTSP system decreased the overall person delays as well.
Recommended Citation
Zheng, Jianyang, Zhang, Guohui, Wang, Yinhai, Briglia, Peter. (2009). Evaluation of Transit Signal Priority Using Observed and Simulated Data. ITE Journal, Volume 79, Issue 11, pp 42-49.
