Sensitivity Analysis of Vehicle Speed in Rear-end Collision Accidents

Jianjun Yang

Abstract


The rear-end accident is the main form of highway accidents in China. Among them, this phenomenon is very common that the trucks involved are basically heavily overloaded. When the rear-end accident occurs, the identification of the vehicle speed is very important. In this paper, the vehicle dynamics is used to analyze the influencing factors of vehicle speed under overload condition. Using the method of factor selection, rolling resistance coefficient, road surface gradient and air resistance coefficient on the vehicle speed and sensitivity analysis were analyzed. From the sensitivity analysis can be seen that the rolling resistance coefficient and road surface gradient have significant influence on the vehicle speed, while the air resistance coefficient is slight. Therefore, in the analysis of the actual vehicle speed calculation, the relevant factors should be considered and should be taken after a reasonable choice. A truck rear-end accident was taken as an example, and the vehicle speed sub-discussion and sensitivity analysis were carried out, and a reasonable speed conclusion was obtained.


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