The US national champion speed trap town is Ridgeland, South Carolina. US 95 goes right through town with plenty of advertising for food and gas at the exits. The exit ramps (wide sweeping ramps , several of them two lanes wide), dump onto a four lane, (but not limited access), where the speed limit is suddenly only 45, (I-95 is 75 mph through there). The cops are always waiting. The two lane through the outskirts of town is 55, 45 35, 45, 35, 25, 35, 45, 55 in just under three miles, with no distinct population center, and no other discernible reason for the difference in speed limit. It took me two tickets to figure out that I'd better learn exactly where the changes occurred. But the thing that makes them the nation champs was the towns decision to install speed cameras on I-95 and just mail photo tickets to those over the limit without even pulling them over. This doubled the towns revenue for a couple of years before the state supreme court ruled against it. The up-side for the local residents is that they have by far the lowest property taxes in the area.