All Traffic Lights Red at Once
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Question: I remember reading in one of the Courtenay newspapers where someone from the City of Courtenay advised that they were changing the timing of the traffic lights in intersections. The change was from (possibly) a half second to a full second – meaning all the lights would be red for this amount of time.

I need to know how long a yellow traffic light at an intersection should stay yellow for? I realize that the posted speed has to be taken into account and if there are advanced flashing amber lights.