i also think caremas in traffic light is pointless.
just like stacy said there some times you can't stop because of weather. if they did they might get bigger chance of being into accident. and just like yoshi said the gov is wasting money. i dont know why police would do sucha kind of things like that. i mean people are not stupid enough to stop at red light. as far as i know people go for most safest thing. i don't doubt that they gonna go even though its red.