Evaluation Methods of the Chengdu Expressway’s Traffic Congestion

Taking necessary measures to counter the traffic block problem is urgent. First of all, through the investigation and analysis, this article summarizes the congestion causes of Chengdu. And then set the evaluation index such as speed, delay in time, the frequency of parking, parking time and the road load degrees of the sections. Through analysis of the statistics, this paper provided a comprehensive evaluation model and the severity of congestion index concept which used to evaluate the rode congestion degree in the situation. Through the acquisition of data, the results model can be carried out on sections of qualitative and quantitative analysis. By calculating, use the serious traffic congestion index to determine the extent section of the serious congestion. The results in the paper can be used for the Chengdu traffic management departments to provide a scientific and rational evaluation system.