基于模糊控制的单交叉口信号配时优化

Signaltiming optimization of single intersection based on fuzzy control

为了降低交叉口的平均车辆延误,减少交叉口各进口道车辆排队长度,采用模糊控制方法,对交叉口的信号配时方案进行优化。建立面向单交叉口的信号配时模糊控制器,对其输入和输出进行设计,并确定模糊规则。根据VISSIM仿真结果进行模糊推理,得到当前相位的绿灯延长时间,以交叉口的平均车辆延误时间为评价指标,在相同的交通条件下对2种控制方法进行仿真。结果表明,优化后交叉口的平均车辆延误时间由原来的34.3 s减小到32.5 s,减小了5.25%。所提关于交叉口的模糊控制为信号配时优化提供了一种新的控制形式。

In order to reduce the average vehicle delay and the vehicle queue length of each entrance of the intersection,a fuzzy control method was proposed to optimize the signal timing scheme of the intersection.A signal timing fuzzy controller was establish for single intersection.Its input and output were designed.And the fuzzy rules were determined.According to the VISSIM simulation results,fuzzy inference was performed to obtain the green light extension time of the current phase.Taking the average vehicle delay time of the intersection as the evaluation index,two control methods were simulated under the same traffic conditions.The results show that the average vehicle delay time at the intersection was reduced from the original 34.3 s to 32.5 s,with a reduction of 5.25%.The proposed research on fuzzy control at the intersection provides a new form of control for signal timing optimization.