Evaluation of the Impacts of Unconditional Active Transit Signal Priority in VISSIM, Case Study: An Intersection of Isfahan

Traffic congestion has been rapidly increasing in cities. It leads to an increase in transit travel time and loss in reliability of transit vehicles. The implementation of the priority system for transit at signalized intersections with high traffic volumes will help reduce transit delays and red lights stops at these intersections. In this paper, we propose an unconditional active signal priority control method for public transportation system, which includes regular buses and a Bus Rapid Transit. we examined 11 different modes of bus availability at the intersection, based on the estimated time of transit arrival. Reduce transit delays at the intersection, increase the convenience and reliability of public transportation, increase the total intersection efficiency and reduce the negative impact on personal vehicles are also considered. Finally, a model simulation was conducted by VISSIM by writing an algorithm modeling in a signalized intersection with BRT and regular bus in Isfahan City,Iran. the results showed that, due to the implementation of this method, BRT passengers delay decreased by an average of 65% and decrease regular bus passengesrs delay by an average of 7% comparing to existing signal control scenarios.