在对待黄灯是否必要的问题上,笔者认为我们确实应该借鉴加拿大安大略省对这个问题的认识:黄灯不仅要设,而且对其时间长短的设计还必须遵循一定的规律,信号周期里的过渡阶段的黄灯、全红时间均有其不可替代的作用——黄灯保证车辆平稳停车,避免追尾,全红保证路口清空,避免交叉方向车辆间发生碰撞。 On the issue of whether the yellow light is necessary or not, I think we should draw lessons from this issue in Ontario, Canada: the yellow light not only needs to be set up, but also the design of its duration must follow certain rules and the transition in the signal cycle Phase of the yellow, red all have their irreplaceable role - yellow light to ensure smooth parking of vehicles to avoid rear-end, all red to ensure that the intersection clear, to avoid cross-collision between vehicles.