Coordinated Signal Timing Optimization with Vehicle Trajectory Under Connected Environment
A joint optimization method considering intersection signal timing and vehicle trajectory was proposed.Based on the original trajectory of vehicles,taking the minimization of vehicle transit time at intersections as the goal of control optimization,a signal timing optimization model was established to calculate the optimal signal cycle sequence and phase time.According to the phase time,the vehicle trajectory was divided into acceleration and constant speed stages before reaching the intersection stop line and acceleration and constant speed stages when passing through the intersection stop line,and the optimal headway and expected speed were obtained at each stage to optimize the original trajectory of the vehicle.The signal timing optimization was carried out again based on the new trajectory.Tak-ing traffic demand,left turn ratio and signal cycle time as consideration factors,the SUMO simulation experiment was carried out,and the proposed joint optimization method was compared with the real-time sig-nal control method.The results show that the joint optimization method can improve the intersection capacity by 30.5％under different balanced traffic demands.Under the random traffic demand,it can improve the in-tersection traffic efficiency by 17.3％.However,the traffic efficiency can be improved by 66.6％and 21.7％under different left turn ratios and signal cycle duration,which verifies the effectiveness of the proposed joint optimization method to improve the traffic efficiency of intersections.
cooperative vehicle-infrastructuresignal optimizationtrajectory planningminimum time headwaydesired velocity
NETL
NSTL
万方数据
