e) Chapter 5 Traffic Control at Single Intersection 5. 1 Basic concept of traffic signal control Signal phase= time sequence for r.o.w 东西直行 东西路 东西左转弯 南北直行 图11两相位信号的相位图 南北左转弯 图11-4 交通信号控制的8个相位Signal phase = time sequence for r.o.w. 5.1 Basic concept of traffic signal control Chapter 5 Traffic Control at Single Intersection