饱和状态交叉口信号配时优化

Signal Timing Optimization of Saturated Intersection

交通需求日益增加和在时间上的不均衡性,使交叉口经常呈现饱和状态,针对目前信号配时方法多适用欠饱和状态条件的特点,提出了一种适用饱和状态交叉口信号配时的新思路,即以交叉口饱和状态的累计消散过程中的车总延误最小建立信号配时周期优化模型,并给了求解步骤,通过实例对比分析现状信号配时效果和其它信号配时方法配时效果,显示了该配时方法的实用性。

With the increase of traffic demand,saturated state of an intersection frequently occurs,especially in traffic peak period.However,the common signal timing method is used for under-saturated conditions,and very little research has been conducted to deal with saturated intersection.In this paper,a new idea of signal timing of saturated intersection is put forward,that is,the optimized signal period model of saturated intersection is established based on the minimum optimization of the total vehicle delay in cumulative dissipated process of saturated intersections.Then the solution is given.The practicality of the method is demonstrated by comparing the timing effect with the present situation of the intersection and other methods.