非常态事件下应急车辆单点信号优先控制策略及实现方法

Signal priority control strategy and implementation for emergency vehicle at single intersection under traffic accidents

以应急车辆单个交叉口延误最小为控制目标,提出了延长绿灯时间、缩短红灯时间以及多相位协调优先3种信号优先控制策略。重点研究了基于应急车辆流量比的多相位信号优先模糊控制策略。提出了基于射频识别技术(RFID)的应急车辆信号优先实现方法。通过仿真软件对所提出的信号优先控制策略进行了仿真评价。结果表明,该优先控制策略可以有效地减少应急车辆在单个交叉口的延误。

The signal priority control for the emergency vehicle is an important measure to guarantee the efficiency of evaluation and rescue under traffic accidents. The minimum delay of emergency vehicle at single intersection as the control target, three signal priority control strategies were proposed which consist of green time extension, red time shortening and multiphase integrated control. The focus was on the multiphase signal priority fuzzy control strategy based on the emergency vehicle volume rate. An implementation method for the emergency vehicle signal priority control strategy was suggested based on the radio frequency identification technique. A simulation was performed by a software to evaluate the proposed strategy, and the results showed that it can reduce effectively the time delay of the emergency vehicle.