Research On Signal Control Optimization Of Urban Road Intersection Based On Vehicle-Infrastructure Cooperation System

With the development of information technology,intelligent transportation system has gradually entered people's field of vision.The intelligent transportation system is an effective means to solve many traffic problems,and its core is traffic management and control.VehicleInfrastructure cooperation technology and signal control are important components of intelligent transportation system and traffic management and control,respectively.In the context of vehicle-infrastructure cooperation,the data acquisition of signal control has undergone new changes,which can obtain traffic information accurately,in real time and in large quantities.This paper follows the academic frontier and studies the signal control methods under vehicle-infrastructure cooperation system to reduce traffic congestion and vehicle delay and improve traffic efficiency.And establish a simulation platform of vehicleinfrastructure cooperation system to verify the effectiveness of the algorithm.Firstly,this paper deeply analyzes the traffic signal control parameters and control benefit indicators,and starts with the design content of adaptive signal control,and closely combines the characteristics of data acquisition under the vehicle-infrastructure cooperation technology,and proposes a micro-simulation algorithm based on the optimization model.The algorithm simulates the road network,which more accurately reflects the traffic condition in a short time and reduces the error caused by the prediction.In order to consider the optimization objectives under different traffic conditions,this paper designs an objective function that comprehensively considers vehicle delay and vehicle capacity,and introduces optimization targets of special vehicle priority.In addition,this paper analyzes the application of phase scheme based on ring-barrier in real-time control,and proposes two methods of rules that explain how to adjust the phase in the phase scheme.Finally,according to the actual situation in China,the application method of the micro-simulation algorithm in the intersection with waiting zone is proposed.Secondly,the simulation platform of vehicle-infrastructure cooperation system is built,which lays a foundation for the signal control simulation under the vehicle-infrastructure cooperation system.Based on the physical framework of vehicle-infrastructure cooperation system,this paper proposes the structural composition of the vehicle-infrastructure cooperation simulation system.Based on the secondary development of the simulation software VISSIM,a simulation platform of vehicle-infrastructure cooperation system is established.Finally,based on the simulation platform of vehicle-infrastructure cooperation system,the microscopic simulation algorithm is verified and analyzed.This paper models and corrects the actual intersections to reflect the traffic condition as much as possible.The simulation shows that the micro-simulation algorithm proposed in this paper can guarantee the special vehicle priority while reducing vehicle delay and improving vehicle capacity.