Research On Arterial Coordinated Signal Control Method Under The Environment Of Vehicle Infrastructure Coopetative Systems

As the core of urban road network,arterial roads bear a great deal of traffic pressure.Improving the traffic capacity of arterial roads is of great significance to alleviate urban traffic congestion.At present,it is difficult to solve the problems of traffic congestion,traffic safety,traffic energy waste and pollution effectively by relying only on traditional traffic signal control technology.Cooperative vehicle infrastructure technology can provide help to improve the operation efficiency of road intersection and reduce traffic congestion through all-round traffic information data collection and vehicle road two-way communication.Therefore,this paper uses the function of vehicle-road coordination technology,combined with the strategy of vehicle speed guidance,to guide drivers to adjust their driving behavior.At the same time,considering the coordinated optimization of the speed guidance and the signal control scheme of the intersections of arterial roads,an improved coordinated control method of the arterial roads traffic signal under the environment of vehicle road cooperation is proposed,this has positive theoretical value and practical significance for solving the shortcomings of the existing coordinated control scheme of arterial roads,exploring new methods of traffic control in the future and improving the traffic operation efficiency of urban arterial roads.Firstly,this paper describes the method of speed guidance control of coordinated control road,and introduces the existing coordinated signal control method of arterial roads and analyzes the existing problems of these methods.Furthermore,under the framework of signal control system of the intersection under the environment of cooperative vehicle infrastructure,the idea and implementation method of the speed guidance control are described.With the help of the two-way information interaction function between vehicles and the infrastructure,considering the coordinated optimization of the speed guidance and the signal control scheme,with the goal of forming a saturated platoon,the paper further proposes the strategy of coordinated control of speed guidance for arterial roads under the environment of cooperative vehicle infrastructure.Secondly,this paper determines the calculation method of the offset of the coordination control model under different conditions,the calculation model of comprehensive evaluation index(PI)based on delay and number of stops is constructed,and the guidance scheme of single vehicle is made according to the guidance strategy.Aiming at the minimum average PI of intersections,an optimal control model for arterial coordination signals Under the environment of cooperative vehicle infrastructure is established,and the application conditions of the optimal model are analyzed and verified,including the guidance speed interval,normal driving speed,intersection spacing and unit green time on the effect of arterial coordination control.Finally,three adjacent intersections on Xiang’an North Street in Harbin are selected for case analysis.With the help of VISSIM simulation software,the comparison and evaluation of the current road,only implementing speed guidance scheme and the arterial coordination control scheme proposed in this paper are carried out.The simulation results show that the arterial coordinated control and the strategy of speed guidance can significantly reduce the vehicle’s PI.After implementing the arterial coordination control scheme proposed in this paper,the two-way coordination of the speed guidance and signal control scheme can be achieved,and the average PI of the vehicle is reduced by 15.9% compared with only implementing speed guidance scheme.