Research on Speed Limit Value Model and Evaluation Method of Urban Trunk Road

Abstract

To reduce the probability or severity of traffic accidents, improve traffic capacity of road, and ensure efficient operation of traffic flow, speed limits have become an important traffic management method of urban truck road. Based on detailed analysis of the current method of determining the speed limit, multifactorial method of determining and evaluating speed limit is proposed. Firstly, considering the safety speed of linear and steady flow, determining the reference value, and the influence of the number of entrances and exits, road width, roadside disturbance, and road conditions are set as correction factors. Then the model of determining the speed limit value is established. Speed scatter and ratio of maximum-minimum of car-truck are put forward as elevation index. At last, a project example is provided to prove the method.