干线公交优先下的相位快速补偿机制研究

Phase Rapid Compensation Mechanism under Arterial Transit Signal Priority

针对干线系统中公交与社会车辆的冲突难以调和的问题,考虑兼顾社会车辆通行效益下的公交优先权,基于干线协调控制背景和公交优先策略设计了一种精细化的相位快速补偿机制。首先,优化公共周期、相位差、绿信比等参数,设计干线协调背景方案。然后,考虑基本绿波带和相位压缩机制,预测实现公交优先通行的有效绿灯区间和协调相位的移动量,同时,优化非协调相位的绿灯损失时间,建立绿灯延长与红灯早断策略下的相位快速补偿机制。与以往独立实施优先和补偿的控制方式不同,精细化的干线配时设计可以更大限度地均衡公交优先下各相位的绿信比。以杭州市海达南路干线为例,在VISSIM仿真平台进行验证,结果表明:实施干线相位快速补偿机制时,公交的优先成功率可达65%。与简单的绿灯补偿方式相比,社会车辆的车均延误由26.81 s降低至24.18 s,各个相位的平均变化量不超过1 s,验证了该方法对干线公交优先控制具有积极作用。

To reconcile the conflicts between buses and social vehicles in arterial systems while considering the transit signal priority(TSP)for guaranteeing the interests of vehicles,a precise phase rapid compensation mechanism is designed in this study based on arterial coordination control and TSP.First,a background plan of arterial signal coordination is designed using various parameters including common cycle,offset,and green splits.Then,a basic green waveband and a phase compression mechanism are considered to predict the effective green-light interval and coordinated phase movement and to optimize for green loss time of the non-coordinated phase.In addition,a phase rapid compensation mechanism under green-light extension and red-light shortening is generated.Unlike in an independent implementation of priority and compensation control,the precise arterial signal timing method using a rapid compensation mechanism sufficiently balances the green splits of each phase.Taking Haida South Road in Hangzhou as an example,a simulation was conducted to verify the mechanism using the VISSIM platform.Results showed that the priority success rate of buses could be maintained at 65%when using the phase rapid compensation mechanism.Compared with single green-light compensation rules,the average vehicle delay was decreased from 26.81 to 24.18 s,and the average variation of each phase was not more than 1 s.The study and simulation thus demonstrated that the algorithm had positive effects on arterial coordination control with TSP.