Evaluation And Optimization On The Intersection Level-of-service In The Northern City Of Winter

The road intersection is the node and an important part of the urban road transport net,and also the bottleneck of traffic flow running. With the rapid development of economic and social progress in our country, Urban road traffic flow and traffic load increases day by day. The traffic flow of intersections with the characteristics of complexity and diversity,thus will first approach or reach the saturated. For most of our northern cities, the four to six months of snowfall and freezing of winter have the serious influence for crossing capacity of intersections, the control of the road traffic conditions and normal operation of vehicles have become a major and difficult issue.Therefore, Evaluate and optimize correct reasonable for the level-of-service in winter intersections has very important practical significance to improve the intersection congestion conditions and optimize the transport net structure in the northern city of winter.This article take the specific type intersection of winter in Harbin for researching object, based on the large number of actual survey data, and combining the road traffic flow characteristics of winter in Harbin. Using the Delphi method and AHP(Analytic Hierarchy Process). Construct a consistent level-of-service evaluation model of Conforming to the winter city driving characteristics and based on the road of fuzzy comprehensive evaluation method. Substituted the Calculated parameters of the level-of-service data into the evaluation of the model,then draw the conclusion of evaluation. And using the VISSIM software VISSIM to micro-simulation analysis for the traffic flow, then improve From the intersection channelization, signal timing, and other programs after verifying the accuracy and credibility of simulation results. Through the simulation contrast to evaluate the intersection level-of-service after improving. Thus providing valuable references for planning and management of The northern city road intersections in winter.