The Study On Traffic Condition And Optimum Design For Urban Road Based On The Consideration Of Traffic Accidents

In recent years,the development speed of the highway construction in our country isvery quickly,the highway is more and more significant to the development of the national economy.But at the same time,in recent years,China's sustained and rapid development of city road construction,city roads becomes more and more significant to the development of the national economy.But at the same time,road congestion phenomenon is becoming more and more obvious.From our country in recent years,the traffic congestion situation can be seen,traffic accidents caused by congestion problem is very serious,causing inconvenience to people's life and travel to work.Therefore,it is very necessary for the occurrence of a traffic accident section and the upstream intersection traffic situation carries on the analysis and the upstream intersection reasonable optimization,to ease the traffic pressure.This paper focuses on the study of simulated accident section and the upstream intersection traffic after the accident analysis,on the basis of the experience of the domestic and foreign related research results above,the optimization scheme according to the congestion problem research.Based on the research into the content of:1?The investigation at home and abroad in recent years traffic conditions of formation and governance,development status quo of the research on signal control.2?Traffic flow theory,expression and relation model between the various elements of the traffic flow,and the correlation between the parameters and the accident.The use of modules and software research on traffic simulation software VISSIM,include the master model,parameter setting,so we can lay a good foundation for the simulation of road and intersection.3?Based on the accident of congestion on the investigation and analysis,based on the SPSS software,the accident occurred in two cases of different lanes of pairing computation samplet,study on accident occupy the lane is not at the same time traffic,node VISSIM simulation model,the establishment of accident of road section and intersection geometry model for simulation model for simulation,actual situation after the corresponding calculation of queuing vehicles arrived,and the upstream intersection of time.4?According to the analysis and research of the section and the upstream intersection traffic accident,make optimization scheme is appropriate,and the optimization results for simulation,comparison before and after optimization of the traffic,the last of this study,the next stage is prospected.