Police set on the old closed portion of Rt. 140 East of Emmitsburg with Radar pointed East to get the West bound traffic crossing and coming down the hill right where the speed limit changes from 50 mph to 40 mph. They also set near that location but on the side of the road with the radar pointed West. Traffic crosses the over pass headed East, and speed up , thinking they are out of town and on the open road but they are still in the 40 mph zone.