基于Vissim仿真的公路环形交叉口中心岛半径优化设计

环形交叉口的几何设计是交叉口的通行能力重要的影响因素之一.为提高环形交叉口的通行能力,针对原有环形交叉口中心岛设计的不足,通过研究交叉口不同车型比例及车辆行驶轨迹,提出了关于中心岛半径设计的优化建议,建立了适用于公路环形交叉口的中心岛半径设计的优化模型,并利用Vissim仿真软件对其可行性进行了验证.

Optimization of Central Island Radius Design of Highway Roundabout Based on Vissim Simulation

The geometrical design of roundabout is one of the important factors which influence the capacity of roundabout. For the purpose of dealing with the deficiencies of traditional design methods of roundabout, several optimization suggestions about radius design of the central island of highway roundabout were proposed through studying the proportion of different types of vehicles at roundabout, and track of driving. A model of radius design was established, which was applicable for the central island of highway roundabout. The feasibility of the new model was verified by Vissim simulation software.