Research on Optimization Scheme of Auxiliary Signal Control in Elevated Exit Area Based on VISSIM Simulation

This paper took Xinyi Road exit of Hetan elevated expressway in Urumqi as an example, established a VISSIM simulation model, and combined simulation conflict analysis software (SSAM) to propose an optimization scheme for traffic signal timing on an auxiliary road, which can improve traffic safety and traffic efficiency. In this paper, a DEA/AHP two-stage model is used to quantitatively calculate the simulation results before and after the optimization of traffic signal timing on an auxiliary road based on three aspects: the number of vehicles arriving, the average delay time between road network and vehicles and the number of vehicle conflicts within the section. The research results show that the auxiliary signal control method proposed in this paper can significantly improve the traffic order and traffic safety in the connection area, and provide reference for the organization, management and control of the connection area between an urban elevated expressway and a conventional road.