Heading north into Ann Arbor on S. Main, the road goes up a hill before descending to the intersection with E. Stadium.(This is Just south of the Stadium.) There is a clearing on the right shoulder at the bottom of the hill where the cop usually sits in a dark car. They love to do it at night so you can’t see them. The road is straight and wide in that section, and going down the hill its easy to be "speeding". In general be on the lookout around the whole Stadium area.