Study of bus-priority traffic signal timing strategy with considering resource constraint

摘要

In order to minimize the total passenger delay and fuel consumption, the bus-priority signal timing strategy for the signalized intersections with dedicated bus lanes is studied in this paper, the traffic efficiency of other vehicles and the energy utilization ratio are considered as well. Two different signal timing models of fixed and unfixed cycle are proposed respectively. Both of the models are optimized using the Genetic Algorithm (GA). The result indicates that both of the bus-priority strategies reduce the total passenger delay and fuel consumption obviously. With higher priority to public buses, the traffic efficiency of other vehicles and fuel consumption are also considered and the holistic throughput of the intersection is increased. In addition, this study shows that the bus-priority signal timing strategy of unfixed cycle is better at reducing total passenger delay and fuel consumption than that of fixed cycle. The experiment which is taken at the intersection of Huizhou Ave. and Ziyun Road in Hefei, China, shows the solution is effective under the situations of fixed or unfixed signal cycles.