Research On Optimal Control Of Phase Difference At Short Spacing Intersection Based On Optimal Strategy Game

Because of the distance is so short,short spacing intersections are prone to overflow due to long queues,which often makes them the traffic bottleneck in the urban road network.Intersection,as a component element of road network,is closely related to the operation efficiency of road network.Therefore,we need to formulate corresponding countermeasures to solve the problem of traffic congestion aggravated or even caused by the existence of short spacing intersections.Firstly,in order to solve the problem of queuing overflow,this paper will obtain the queuing length at different spacing of intersections under fixed service level through Synchro simulation experiment,analyze the relationship between spacing and queuing overflow probability by control variable method,demonstrate the necessity and feasibility of controlling short spacing intersections,simulate the congestion of short spacing intersections under different traffic flows by mathematical modeling method,and summarize their traffic characteristics.The relationship between queuing dissipation time and signal lights is analyzed,get the relationship between congestion dissipation and signal lamp.At the same time,in order to increase the theoretical basis of signal optimal control target,the element comparison method is used to construct the judgment matrix of intersection,and the optimal control target is discussed by the dominant game method,and the optimal control target of intersection is obtained.Through the analysis of intersection priority control under different states,the importance model of intersection is established to determine the priority level of intersection in coordinated control.Secondly,according to the characteristics of short-line intersections and the optimal strategy analysis of dominant game theory,a phase difference optimal control model with minimum delay is established.The model restricts the maximum queue length to prevent the queue overflow at intersections.By comparing the delay levels of different release modes,the optimization method of phase difference is obtained.Finally,two-phase,four-phase and Xinjiang Urumqi " LaoShiWei "-" XiDaQiao " intersection as the optimal control object,verify that the phase difference optimization method proposed in this paper has better characteristics in reducing delay and improving operation speed.The phase difference control optimization method proposed in this paper has important reference significance for solving road network congestion and coordinated control of diversified intersections caused by the existence of short-line intersections.