To solve the problem of traffic safety,traffic inefficiency and other issues that caused by the traffic flow intertwined with each other at Y-shaped intersection-group in urban area,a double-cycle green wave coordination and control model was established,which was on the basis of the time-space diagram and had a target of maximizing the two-way bandwidth of green wave.The proposed model could separate the two traffic flows coming from upstream intersections in time sequence and make them pass through the downstream intersections respectively,so as to solve the problems of safety and efficiency caused by the interweaving of vehicles.The actual case study and simulation results show that:compared with the single point signal timing scheme,the proposed model has significant effect on reducing vehicle delay time,reducing vehicle parking number and improving traffic safety.It is showed that the proposed model has a significant effect on improving the traffic efficiency and traffic safety of the Y-shaped intersection-group,and has a certain theoretical and practical value.%针对城市Y型交叉口群中车流相互交织而引起的交通安全、通行效率低下等问题,基于绿波时距图,以双向绿波带宽最大为目标,建立了一种面向Y型交叉口群双周期绿波信号协调控制模型.该模型能够在时间顺序上分离上游驶来的两股车流,使其分别依次通过下游交叉口,从而解决了车流相互交织而引起的安全、效率等问题.实际案例与仿真结果表明:相比于单点信号配时方案,所提出的模型在降低车辆延误时间,减少车辆停车次数,提升交通安全等方面有显著效果.这表明该模型对提升Y型交叉口群的通行效率与交通安全具有显著效果,具有一定的理论意义与实践价值.
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