Improved Arterial Signal Coordination Based on Transit Signal Priority Strategies

Arterial signal coordination can effectively improve the traffic efficiency of the road, but the difference between general vehicles and buses is not taken into account, which may increase the delay of buses. In this paper, we propose an arterial signal coordination model based on transit signal priority (TSP). When no bus arrives, this model can provide sufficient bandwidth for general vehicles, while when a bus arrives, it can provide bandwidth for the bus by using the transit priority strategy. The performance of the TSP model is evaluated with the traditional models through VISSIM simulation. The results show that the average delay of general vehicles is reduced by 4.77%; the number of stops is reduced by 3.77%; the average delay of public transport vehicles is reduced by 11.35%; the number of stops is reduced by 2.06%; and the per capita delay is reduced by 7.22%. Besides, the model has good effects under different bus flows.