Hook-turn交叉口设置与效益研究

Research on Setting and Profit of Hook-turn Intersection

Hook-turn是一种有效改善交叉口车流延误的信号控制方式。文中讨论了Hook-turn交叉口的空间设置方法和设置条件;分析了其安全效益和延误效益;建立了以交叉口车总延误最小为优化目标,周期和绿信比为自变量的信号配时优化模型,确定Hook-turn交叉口信号配时。通过假设的交叉口,对Hook-turn方式和传统控制方式的安全性和延误进行对比。结果表明,Hookturn方式较传统控制方式有助于降低交叉口车总延误,同时提高了交叉口安全性,改善了交叉口运行效率。

Hook-turn is an effective signal control method to improve the situation of delay of motor vehicles at intersection.The spatial setting method and condition of hook-turn are discussed,and its profit on safety and delay is analyzed.A signal timing optimization model is developed which aims at minimizing the total vehicle delay and takes the circle and split as independent variables,and the timing schedule of the intersection is determined.By a hypothetical intersection,a comparison on the delay and safety between the traditional controlling mode and the Hook-turn mode is made.The result shows that Hook-turn does be a good way to decrease the delay and raise the safety to improve the operation effectiveness at a signal intersection.