基于总量控制的城镇桥梁信号协调模糊控制

Coordinated fuzzy control of traffic signal based on total quantity control for city bridge

为提高桥梁两端交叉口的通行能力,减少桥梁上车辆的排队长度,降低车辆拥堵对桥梁的损害,提出一种总量控制的思想,根据不同桥梁可容纳的最大车辆总量,对桥梁两端交叉口进行实时的信号协调模糊控制,并以最大排队长度为评价指标。通过MATLAB和VISSIM仿真,结果表明:最大排队长度由溢出减少至25.1辆,能够有效地提高桥梁及其两端交叉口的通行能力及运行效率,降低桥梁交通拥堵对桥梁安全的影响。

To improve the intersections’ capacity, reduce the queue on the bridge, and decrease the damage to the bridge from vehicle jams, a total quantity control method is proposed in the paper. According to the maximum vehicle capacity of bridge, it manages the intersections with real-time and coordinated fuzzy control of signal, taking the maximum queue length as the evaluation indicator. The results of MATLAB and VISSIM simulation show that the maximum queue length can be de-creased from overflow to 25. 1 PCU. The presented method can enhance the capacity and efficiency of intersections’ traffic, and reduce the effect of bridge traffic congestion to the safety of bridge.