干线信号协调控制下的公交优先研究

Bus signal priority under arterial signal coordination

为了在干线协调控制下实现公交信号优先,提出了干线协调控制下的公交优先双层优化方法.上层为干线协调层,以检测到的社会车辆信息为依据,采用最大绿波带法,优化干线交叉口的公共周期、绿信比和相位差;下层为公交信号优先,以干线协调控制层的绿波带上下限为控制约束条件,在不破坏约束的条件下采用绿灯延长、红灯早断的公交优先控制策略,将公交优先融合到干线协调控制中.根据优化算法,建立公交优先控制流程,利用微观仿真软件Transmodeler进行了模拟验证.仿真结果表明:协调控制下的公交优先控制算法虽然会导致干线总体车均延误增加,但是能有效减少公交车辆延误和干线人均延误.

A double-level design is presented in this paper in order to achieve bus signal priority under arterial signal progression,the upper level is progress control,in which the largest green wave band method is adopted to optimize the main intersection of public cycle,green ratio and phase difference based on the data of car flow detector and the lower level is bus priority control in which green extension and red truncation are adopted to achieve bus signal priority under the condition of signal coordination.According to the algorithm,bus priority control process is established using the microscopic simulation software transmodeler simulates validation.The simulation results show that the control of bus priority under coordinated control algorithm can reduce bus delay and the average delay per line although increase the trunk delay.