Transit Signal Priority (TSP) is an operational strategy that facilitates the movement of transit vehicles through traffic-signal controlled intersections with the objective of reducing travel time and the variability in travel time of transit vehicles. The Utah Department of Transportation (UDOT) and the Utah Transit Authority (UTA) sought to implement TSP to reduce transit travel time and travel time variability. This study assessed the impacts of TSP on bus performance and general traffic conditions. The tested TSP system utilized dedicated short-range communications (DSRC) technologies and a modified Multi-Modal Intelligent Traffic Signal System (MMITSS or MMITSS-UT for Utah’s system). DSRC allowed buses to communicate with traffic signals along Route 217 in Salt Lake County and the Utah Valley Express (UVX) in Utah County; the former was a conventional bus route while the latter was a bus rapid transit (BRT) route. Field generated data from February to August 2019 were used to evaluate bus performance and general traffic conditions.
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