信号控制下交叉口延误计算方法研究

为了对交通信号控制参数进行优化,需要对交叉口延误进行定量的分析与计算。根据信号控制交叉口理论,在以往定时信号延误研究的基础上,基于交叉口一个进口方向的车辆延误分析,针对交叉口各进口方向同时处于非饱和与同时处于过饱和交通状况,分析并推导了交叉口延误公式.并用具体的算例说明了公式的用法。公式表明了交叉口延误与信号控制参数、车辆到达率等参数之间的动态关系,为进一步研究交通信号自适应控制方法和建立交通信号控制参数优化的性能指标函数提供了信息。

Study of calculation method of intersection delay under signal control

In order to optimize signal control parameters, intersection delay should be carefully analyzed and calculated. Adopted signalized intersection theory,based on the research foundation of vehicle delay of fixed-time signal control and the analysis of the vehicle delay on an approach direction of intersection, authors have analyzed and inferred intersection delay formulation directed against the non-saturated and over-saturated traffic conditions of intersection approaches. And authors have applied specific cases to illustrate how to use them. The formulation has indicated the relations among the signal control parameters, vehicle arrival rates and intersection delay and it provides useful information for further studying adaptive signal control method and establishing performance index function of signal control parameters optimization.