To reduce the probability of accidents or the severity of accidents, improve traffic capacity, and ensure the efficient operation of traffic flow, the speed limit has become one of the important means of highway traffic management. Based on the systematic analysis of the existing methods to determine the speed limit value, post speed limit value determining model has been proposed in the paper. Firstly, the safe speed considering the three factors of the flat curve, the vertical curve, and the free flow of traffic is taken as the reference value for limiting the vehicle speed. Secondly, comprehensively considering the influence of roadbed cross-section, traffic composition, pavement conditions, large structures, traffic accidents, and operating speed coordination, as a correction factor, a multi-factor speed limit value determination model is constructed and verified by engineering examples.

CICTP