Research on bus signal priority base on bus service frequency

Bus signal priority can improve the operation benefit for public transit department, and reduce bus traveling time on route and waiting time at signalized intersections. A bus signal priority control logic was developed that can improve bus performance without impacting the other traffic adversely. The departure ratio and performance index (PI) were used to balance the conflict of bus agency and traffic agency. The processing of this priority control logic is made up of detection, traffic condition estimate, leaving time estimate, arrival time estimate, priority trigger and strategy optimization and decision making. Finally, the effectiveness of this control logic is evaluated using microscopic simulator, VISSIM. A statistical analysis packet, SPSS, was used to analyse the simulated data. The results show that this signal priority control logic improved the regularity of bus travel time, increased bus speed and reduced average delay to general traffic. For the covering abstract see ITRD E140665.