We don't care how they do it outside. If Traini can't remember that he needs to go outside. We don't need red light cameras. 
If you want to solve that problem -or most others involving driving - we need to require better drivers. Why not require anyone who drives in the State to prove they know how to drive that big wheel big engine machine safely at 100 miles per hour on the ice while talking on a phone, smoking and drinking coffee- that is what they do every day going to work.