The systematic study on the traffic accidents mechanism of the expressway interchange spacing-restricted exit, as well as the exploration on the law and trends of traffic accidents in the existing traffic conditions, can effectively prevent the traffic accidents in the area of small interchange spacing, which is important to improve the security of such area. The paper qualitatively elaborates the relationship between traffic accidents and the traffic flow parameter such as traffic volume, velocity, traffic composition in the area of small interchange spacing. For the high case of rear-end collision, it researches rear-end collision mechanism on such area. It provides a theoretical basis for the establishment of the traffic accident model and the research of the security design technology of the expressway interchange spacing-restricted exit.

CICTP