综合考虑公交相位优先和非公交相位补偿的单点信号优化方法

为降低公交车辆在交叉口的延误,同时兼顾社会车辆的通行效率,提出了一种综合考虑公交相位优先和非公交相位补偿的单点信号优化方法。首先,公交优先算法以交叉口的人均延误模型为目标函数,以遗传算法为求解工具,研究了绿灯延长策略ΔGt和红灯早断策略ΔRt的选取。然后,在实施公交信号优先的后续周期对非公交相位进行补偿,从而降低公交相位优先对社会车辆的影响。最后,以北京市朝阳路与高碑店北路交叉口为例进行验证。结果表明:优化后的交叉口人均延误明显降低,且非公交相位补偿策略使社会车辆的通行效率没有受到太大的损害。

A Signal Priority Method Considering Bus Phase Priority and Non-bus Phase Compensation at an Intersection

To reduce the delay of public transport at a signalized intersection and improve the traffic efficiency, a signal priority method considering bus phase priority and non-bus phase compensation is proposed. First, the model of average passenger delay of the intersection is selected as the objective function in the algorithm of bus signal priority. Genetic algorithm is used to search for the optimal value. The selection of green extension ?Gt and early red ?Rt is studied. Subsequently, to reduce the effect of bus signal priority on the social vehicles, non-bus phase compensation is executed in the subsequent cycle. Finally, the intersection of Chaoyang Road and North Gaobeidian Road is taken as an example to demonstrate this method. The results show that the average passenger delay is reduced and the passing efficiency of social vehicle isn"t significantly degraded by using the bus signal priority and the non-bus phase compensation.