This is what we call the "Cat and Mouse" approach that the State Police use. 2 cars will sit on the most southern side of the overpass and aim their gun down onto the interstate below nabbing vehicles going North bound> They then radio ahead to awaiting cars anywhere from 1-3 miles ahead to pull you over. Keep this in mind. THIS IS ILLEGAL!! If you ask to see the radio gun with your "alleged" speed, they MUST SHOW YOU!! Chances are, smokey who originally gunned you, has already reset his gun and is monitoring other cars. I have used this as a defense twice now, and BOTH tickets were dismissed!!!