Research On Traffic Impact Analysis Method Of Urban Large-scale Construction Projects

Traffic impact analysis belongs to the concrete realization of the micro level of urban planning and is an important means to coordinate the contradiction between land use and transportation system.The traffic impact analysis results of each construction project will play a guiding role in the development of urban traffic,and the determination of the impact threshold and the impact scope as the two important links of the traffic impact analysis system will determine the effectiveness of traffic impact analysis results to some extent.Therefore,it is very relevant to research the way to determine the criteria of impact threshold and impact scope.This paper deeply analyzes the basic principles and processes of traffic impact analysis,and identifies the key links and technologies that need to be explored.Aiming at the threshold of traffic impact analysis,it is divided into the threshold of traffic volume and the threshold of project scale.Based on the equivalent traffic flow theory,the traffic volume threshold of the project based on the traffic capacity limit of the surrounding roads of the project is established;According to the project traffic generation rate,the theoretical method of the project's scale threshold is deduced,and then the rationality of the method is verified by the simulation project road network.In view of the determination of traffic impact scope,the feasibility of using social network analysis method(SNA)to analyze road network is determined by comparing the similarity between road network elements and social network elements in sociology.Based on the analysis of social network,this paper puts forward the method of determining the key intersections in the road network by the indexes of node strength,eigenvector centrality and spacing centrality,and then uses the key intersections to condense the traffic influence scope of the construction project,and the validity of the method is verified by an example.Finally,the specific operation of traffic impact analysis is presented by using actual cases,and the advantages and disadvantages of the proposed method and the current method are compared and analyzed.The research done by the thesis has certain theoretical significance and reference value for the practical application of traffic impact analysis.