Traffic accident influence in freeway tunnel simulation analysis based on the VISSIM

摘要

In order to study traffic accident influence in long freeway tunnel, a traffic simulation model is established by using VISSIM. It's taken the Jiulingshan Tunnel which is the first long tunnel in Jiangxi Province as the research object. Under different levels of traffic flow and different proportion of truck traffic conditions set up, it has obtained vehicle queue length and delay time after traffic accident happened in the long freeway tunnel. Further, it has analyzed traffic accident influence in long freeway tunnel on vehicle traffic capacity and achieve driving safety in tunnel to a greater extent. Jiangxi Province is a province with typical southern terrain that nearly two-thirds of it is covered by mountains, hills and rugged areas. As an important part of freeway, tunnel is one of the important projects of freeway, which determines the integrity and controlling of a freeway. Many uncertain factors exist in vehicle operation in tunnel, which increases the probability of occurrence of various accidents and may bring great risks and severe accident consequences. Besides, the aftermath of accident is rather difficult, causing rather great impact on the traffic in tunnel. Based on the actual situation, it is very important to study the traffic safety in the tunnel.