Intersection Signal Timing Optimization based on Webster Timing Method

Abstract The traffic conditions at the intersection have an increasingly high impact on the normal operation of the road. Improving the signal timing can effectively improve the congestion at the intersection. Taking Xi’an North Street intersection as an example, this paper improves signal timing by Webster timing method. The results before and after the improvement are simulated by VISSIM simulation software. The delay, queue length, parking time and parking times before and after the improvement are compared and analyzed, and the conclusion is drawn. The simulation results show that after optimizing the signal timing, the vehicle delay is reduced by 25.24%, the parking time is reduced by 35.16%, and the maximum queue length, average queue length and number of stops are also reduced. It can be seen that the optimized intersection operation status significant improvements have been made.