I can think of a few times that I've run yellow->red lights because it didn't really make sense to stop. Granted, I could have stopped -- that's not to say it's exactly sane to. Someone had a problem in math lab the other day about how traffic engineers decide upon the yellow-light delay based upon the speed of the road. Never could figure that one out. Anyways, cops in Michigan don't pull you over for running "pink" lights . . . at least not that I've ever experienced/seen.