where did the term red light district come from
Red-light district The term red-light district originates from the red lights that were used as signs of brothels.[2]
Turn on red A turn on red is a principle of law permitting vehicles at a traffic light showing a red signal to turn into the direction of traffic nearer to them (almost always after a complete stop) when the way is clear, without having to wait for a green signal. It is intended to allow traffic to resume moving, with minimal risk provided that proper caution is observed.