信号交叉口可变车道主预信号配时协调关系研究

Coordinate Relationship between Main Signals and Pre-Signals of the Variable Lane at Signalized Intersection

为缓解各流向交通流量分布不均导致的交叉口特定流向交通拥挤,减少道路交叉口的资源浪费,基于主信号和预信号联合控制的信号交叉口控制方法,采用预信号换道线的概念,对预信号的设置方法进行分析,提出了车道属性过渡中预信号的配时方案及其计算方法;通过交通仿真软件VISSIM分别对设置可变车道前、后以及不同的主预信号协调方案进行了对比。研究表明:该方法能够使关键状态参量(如延误)显著降低。

In order to alleviate the traffic jam that caused by the traffic flow maldistribution,and reduce the waste of capacity of intersections,a new kind of signal intersection control method was proposed.The proposed control method is based on the combined control of the main signal and the pre-signal in which the concept of the changing line behind the pre-signal was put forward.Meanwhile,the setting method of pre-signal was analyzed,and the timing formula and the calculation method of pre-signal in the process of lane transition were proposed.Then schemes before and after setting the variable lane as well as different coordinate schemes between main signals and pre-signals were simulated and compared with VISSIM.The simulation results show that the method can significantly reduce the key state parameters such as delay.