3 to 5 Highway Patrol units working together with radar. Sometimes one will hide in plain sight then another unit or two will be a mile or so down the road, catching those that thought it was safe to “roll”. This is also practiced on the move with 3 or 4 units in close succession. They also have zero tolerence days, where even just a mile or two over will get you a ticket. This is nothing more than a revenue generation tool as there are far less safe roads in the county. Please Note: Apparantly local custom is to flash oncoming civilian vehicles which indicates that you are approaching a parked radar unit.