There's plenty of history telling us red light camera's are littered with constitutional  issues,  questionable effectiveness, misuse by the government, all which at one time or another has had to be settled by the courts. Government officials always find a way to morph red light camera's into a cash cow. If there's a problem in a certain intersection, put a policeman there to do what the police are trained to do.......forget red light cameras and spend your time figuring how your going to build rail...........