行人因素约束下单交叉路口交通信号模糊配时

Traffic Signal Fuzzy Timing of One Single Intersection with the Restriction of Pedestrians

针对人、车混合流现象,对四相位三车道十字交叉口的交通信号进行模糊配时。首先根据路口的交通流状况,合理地设置相位、相序,采用"迟起"、"早断"方式对行人交通信号进行配时;然后,考虑到行人控制信号对机动车通行的影响,借助于模糊控制算法,对机动车信号进行配时。数值实验表明,考虑行人因素的模糊控制方法在车辆平均延误时间上较之传统定时控制方法大为改善。

This paper considers traffic signal fuzzy timing of a single intersection composed of four phases associated to three traffic lanes, depending upon mixed traffic flows caused by pedestrians and vehicles. Firstly, rational phases and phase orders are designed to carry out pedestrian traffic signal timing by means of different fashions of ＂late startup＂ and ＂early stop＂, relying upon the conditions of traffic flows. Secondly, a fuzzy control algorithm is applied to vehicle traffic signal timing, while considering how pedestrian exclusive control signals affect vehicle signals. Experimental results show the fuzzy control method is more effective than the timed control method in reducing average vehicle delay time.