Research On The Optimization Method Of Urban Arterial Road Traffic Organization

In recent years,our country is in rapid development,urban construction,motor vehicle ownership has made urban roads bear the increasing traffic pressure,the contradiction between supply and demand of traffic of the resulting traffic problems,such as traffic congestion,environmental pollution,how to effectively reduce the traffic delay,improve the efficiency of road transport becomes the important content of urban development.Therefore,scientific channelization design and traffic signal timing are the key to make full use of urban road space and time resources.Urban road intersections are the "bottleneck" of the road network,and there is often a greater correlation between adjacent intersections.At the same time,the coordinated control of the whole road should be considered comprehensively.Therefore,how to organize and optimize intersections scientifically and reasonably to improve intersections’ performance and carry out trunk coordinated control of urban trunk roads is of great significance.Based on the traffic organization optimization project of Wenhua road in Laiwu city,this paper makes an in-depth study on the traffic organization optimization method of urban trunk road under unsaturated state.Firstly,the research results of channelization design at home and abroad are summarized,and the research results of single point signal control and trunk coordinated control at home and abroad are summarized.Secondly,intersection highly channelizing design principle,the organization and methods,the classification,the basic parameters of intersection signal control,the sequence of the phase design and timing calculation method is discussed,on the basis of the selection of signal control at intersection delay,stop times and traffic capacity of three important evaluation indexes,the optimal signal timing optimization model is established.Again,the basic concept of coordinated control of arterial road signals,and suitable conditions are introduced,respectively from public cycle and phase transition structure,distribution of green light time three aspects has carried on the optimization of phase transition structure more flexible lap model design method,considering the intersection spacing to determine the impact of public period and the determination method of the cycle is improved,a green light in the allocated time coefficient is introduced to increase the green time limit condition is improved,then the biggest green wave band in the traditional model,on the basis of the objective function and constraint condition of optimization and establish the distance signal coordinated timing model.Finally using the Synchro and VISSIM traffic simulation software,in the case of Wenhua road in Laiwu city traffic organization optimization simulation evaluation,the results show that each intersection and the running state of the arterial road traffic is improved,demonstrates that the presented optimization method and the applicability of the optimization measures,in order to optimize the signal control method,improve the intersection and distance performance provides the certain research significance.Finally,the paper summarizes the content of the paper and puts forward the future prospects.