Study On The Optimization Scheme Of Signalized Cross Intersection Under Mixed Traffic Environment

Mixed traffic flow refers to the traffic conditions intertwined between non-motor vehicles,motor vehicles and pedestrians,which can be easily observed in most of the small and medium cities in china,on the urban trunk roads.Signalized intersection is the key point having this mixed traffic flow problem,and it is also the key location of urban road network.Under the accelerated development of urbanization and the increase of vehicle ownership,the contradiction between the increasing traffic demand and the existing road capacity is increasing,often leading to the intersection of the road slow,blocked traffic and even impassable.This is more serious during traffic peak hours when not only seen greatly reduced intersection capacity,but also increased travel time,resulting in more travel delays,polluted atmosphere,wasted energy.Therefore,it is very important to solve the real traffic problems of urban road intersections of mixed traffic,by making use of scientific and reasonable optimization method to make the road crossing smoothly and create relaxed and happy travel environment.The purpose of this study is to analyze the chaotic phenomenon of mixed traffic organization at the intersection of the crossroads of small and medium-sized cities,and to analyze the intermittent traffic of the mixed traffic flow at the road intersection.By the investigation of the current situation of Road intersection traffic channelization and signal timing,and then comparing with the traffic monitoring data of the intersection,two kinds of integrated traffic organization optimization schemes are obtained by using the channel optimization and using the Webster timing optimization method and using the time-sharing optimization software TRANSYT,Finally,the simulation software VISSIM is used to demonstrate,Using the traffic survey,the current situation modeling,model checking,model optimization,model evaluation to form a set of scientific and reasonable method of optimizing mixed traffic organization,TRANSYT was also used to optimize the timing,but because of the limitations of the software,less domestic applications.Previously applying to the earlier version of the software,with the gradual improvement of the software in the cycle,road traffic flow model,so that it is more flexible,greatly enhancing adaptability,Therefore,the purpose of this study is to propose a new integrated traffic organization optimization method based on the updated TRANSYT software to improve the traffic efficiency.The main research work of this paper is as follows:(1)Through the actual investigation of the crossroads of the urban mixed traffic flow road,Including channelization,mixed traffic flow and other traffic factors,to collect the data of the bayonet flow monitoring data at the road intersection;(2)Combining the theory of channelization optimization with urban crossroad and the suggestion of channelization optimization,applying the Webster signal control optimization algorithm,to obtain the signal timing optimization scheme;(3)By using the updated signal timing optimization software TRANSYT combin with the mixed traffic flow separation method,the signal timing optimization is carried out for the signalized intersection of urban mixed traffic flow;(4)Taking the crossroads of the main city of Yuzhou City,Henan Province as an example,analyzing the results of two timing optimization schemes for mixed traffic flow in combination with channelization and Webster and TRANSYT signal timing optimization software,and the evaluation of simulation software VISSIM.To demonstrate the feasibility of this new traffic organization optimization method for signal optimization software TRANSYT;...