You all know what a speed trap is, right? If you have a highway running through your small town, you can make a lot of money by ticketing out-of-state drivers who are going one or two miles per hour over the speed limit. How many victims are going to waste time trying to fight it, after all?
But have you heard about "forfeiture corridors"? That's a little different — and quite a bit more lucrative. All you have to do is pull over an out-of-state driver for supposedly making an unsafe lane change, have your police dog sniff around for a bit of marijuana residue, and then use civil asset forfeiture laws to impound any cash you might find. Apparently it's especially popular on highways leading into and out of casino towns. Radley Balko has the details here.