交叉口应急车辆信号优先控制的两阶段模型

Two-phase model of emergency vehicle signal preemption control at intersection

根据应急车辆行驶特性,建立信号优先转换与优化的两阶段模型.分析了车辆检测器和应急车辆检测器的设置方法,建立了以应急车辆安全无延误通过交叉口为目标的第一阶段模型,和以社会车辆排队最小为目标的第二阶段模型.通过VISSIM仿真,验证了该模型能确保应急车辆在高峰和平峰两种情况下安全无延误地通过交叉口,同时降低其它车辆在交叉口的延误.

According to operational characteristics of emergency vehicles, a two-phase model was built to convert and optimize signal. The setting distances of vehicle detector and emergency vehicle detector were analyzed, and the first stage model to guarantee that emergency vehicle gets through intersection in safe and without delay, and the second stage model to minimize queue length of ordinal vehicles were modeled. With VISSIM simulation, the model was validated to emergency vehicle getting through intersection without delay in peak and off-peak traffic, while delay of other ordinary vehicles was reduced.