At my college they are using laser. I clearly saw the leo aiming through the scope on his laser and targeting cars as I went by in the 20 zone. I had gotten pulled over 2 weeks ago doing 34 in a 20 but he let me off on a warning. I wondered why my RD did not go off and he got me with close range laser it turns out. I checked out that same road a few times, and sure enough the LEO is being sneaky hiding in between parallel parked cars next to the recreational field. Whats funny is the all the University Police are using Laser while the State Troopers are all using radar. It would make more since that it would be the other way around since they are just university cops lol.