基于VISSIM仿真的地下道路匝道合流区安全分析

Safety Analysis of Ramp Confluence Area of Underground Road Based on VISSIM Simulation

摘要:

为了评价苏州独墅湖通道大纵坡接小半径地下匝道及合流区的道路安全水平，基于VISSIM仿真模拟搭建模型，针对大纵坡接小半径地下匝道及合流区的道路安全进行仿真研究，并提出对应的安全等级及特征。结果表明：随着交通量的增加，车均延误和排队长度均呈增大；在匝道线形受限条件下，合流区仍然具有较好的通行水平，且交通流处于稳定状态，说明合流区的安全状况良好。

Abstract:

In order to evaluate the road safety of underground ramp and confluence area with large longitudinal slope plus small radius in Dushuhe Passageway in Suzhou, VISSIM simulation is based to build the model for its simulation research. And the corresponding safety level and characteristics are put forward. The results show that with the increase of traffic volume, the average delay and queue length of vehicles increase. Under the condition of limited ramp alignment, the confluence area still has a good traffic level and the traffic flow is still in a stable state, which shows that the safety situation of confluence area is good.