[HiTech RedNeck]

It’s true, you at the least want a vehicle with normal stopping ability in normal conditions traveling at normal traffic speed to be able to come to a complete stop between green and red, arriving at the stop line, upon yellow alert. Less yellow is asking for trouble, and why. Unless there is a system of pre-yellow alerting (blinking green?)

[Nowhere Man]

It’s true, you at the least want a vehicle with normal stopping ability in normal conditions traveling at normal traffic speed to be able to come to a complete stop between green and red, arriving at the stop line, upon yellow alert. Less yellow is asking for trouble, and why. Unless there is a system of pre-yellow alerting (blinking green?)

I remember Mom told me that back in the 1950's, when the traffic light went from green to yellow, the yellow would come on while the green was still on and then the green would go out.