Relationship between Speed Characteristics and Traffic Safety on Freeways in Mainland China

  • Ziyue Tang School of Resources and Safety Engineering, Central South University, Changsha Hunan, 410083, China

Abstract

Based on the traffic accidents statistical data of 10 typical freeways in mainland China, by using of some kinds of regression model, the influences of the average vehicle speed and the speed standard deviation on the traffic safety are studied. According to the regression results, the accidents show an increasing trend with the increase of the vehicle average speed and the speed standard deviation. On this basis, in view of the regression results, the strategy is put forward for controlling the vehicle average speed and the speed standard deviation, which has important theoretical and practical significance for improving highway safety. After a comprehensive comparison among these regression methods, it is found that the nonlinear regression method of user-defined model expression has the best fitting effect, and it can also more accurately describe the objective reality. It has high practicality and popularized value.

Keywords: multivariate nonlinear regression model, average vehicle speed, speed standard deviation, traffic safety, control strategy
Published online
2018-06-21
How to Cite
Tang, Z. “Relationship between Speed Characteristics and Traffic Safety on Freeways in Mainland China”, Periodica Polytechnica Transportation Engineering. doi: https://doi.org/10.3311/PPtr.12060.
Section
Articles