Analysis of traffic flow characteristics for urban expressway
Based on traffic flow data from RTMS at Beijing second ring expressway,we establish a correlation model among expressway volume,speed and occupancy.Traffic flow curves of expressway are acquired by data fitting,based on which we can address running characteristics of traffic flow.We obtain status classification result of free flow,congestion flow and blocking flow with fuzzy c-means clustering.We can therefore quantitatively calibrate the area of these flows on the expressway.Analysis of time variant and spatial characteristics for fundamental parameters of traffic flow can comprehensively grasp traffic conditions of the expressway and provide reference for traffic management of urban expressway.
国家科技期刊平台
NSTL
万方数据
维普
