基于综合饱和度的单点信号控制方法

Isolated intersection control based on integrated saturation degree

摘要:

为了提升单点交通控制效果,首先考虑交叉口停车线前车辆排队情况,定义了综合饱和度概念,该指标既能反映车流对交叉口的时间资源利用程度,也能反映其路段空间资源利用程度.基于综合饱和度概念,研究等综合饱和度的交叉口信号控制参数的优化方法.针对优化方法的特性,利用迭代法进行求解.结果表明,基于综合饱和度的单点信号控制方法与传统的等饱和度最小延误控制方法相比,在高峰期间可以显著降低路段排队长度.

Abstract:

In order to improve the intersection control efficiency,the concept of integrated saturation degree is established based on the derivation of traffic wave behind stop line.This index can reflect the temporal resource usage as well as spatial usage.Then delay minimization isolated intersection control method with equal integrated saturation degree constraint was established.The iterative method was used to solve this constraint due to the non linear feature.Numerical example was carried out to compare the control benefit.Results show the proposed method can efficiently decrease queue length during rush hours.