I think we have all heard of police officers riding trains to catch people not obeying crossing signals. But the Great Lakes Central Ry. ran a plow train from Cadillac, MI to Petoskey, MI on 2-28-08 with a Michigan State Police officer on it to ticket snowmobilers on the right of way. They placed MSP logos on both sides of the plow while it was running. See the link below for the story.