Research On The Method Of Network Optimization And Evaluation Based On Constructing Urban Traffic Microcirculation

As the take-off of economic strength and the development of the automotive industry complement each other in China,urban transportation is also facing severe challenges in the future.China's major cities gradually been suffering from a "traffic congestion" common problem which is trending to spread to small and medium-sized cities."Heavy trunk road,light slip road" planning over the past few decades has been difficult to meet the development of urban transportation.In order to seek new traffic planning ideas,urban traffic microcirculation has become one of the focuses.Urban traffic microcirculation network system can solve the traffic problem of road system at the end to slip network as a carrier.Therefore,it is very important to deepen the study of traffic microcirculation.Firstly,the research experience of the predecessors at home and abroad is summarized in order to carry on the systematic research to the city traffic microexamination.On the basis of this,the traffic microcirculation is classified according to different characteristics,and its characteristics are analyzed in depth,and the relationship between traffic circulation and slip network is expounded.Secondly,the paper puts forward the optimization method of urban traffic microcirculation network system.Based on AHP and GRA,the congestion nodes and sections in the urban road network are clarified.Traffic microcirculation alternative paths are searched targeted on those node and sections,and the microcirculation road needed opening up is cleared.The quantitative methods of the key indexes in the system are studied in order to control the planning and construction of the microcirculation network,including the three indicators of road network gradation,road spacing and road network density.Thirdly,a evaluation system of microcirculation network is established in order to evaluate the effect of the above optimization method.The system mainly includes the macroscopic and microscopic two levels of indicators,and the acquisition of these indicators is described specifically.The optimization of traffic microcirculation can be guided from the quantitative point of view through the evaluation system.Finally,the validity of the above theory is confirmed by the optimization of traffic microcirculation in Chenzhou as the case.The urban traffic network optimization method is used to optimize the urban road network structure,and then the corresponding evaluation index is evaluated by the simulation software.The paper puts forward the conclusion that the traffic microcirculation network system optimization method can improve the urban traffic effectively.