In AZ and I am sure a few other states we have photo radar vans that sit on the side of the road giving tickets.. I though the V1 would easily pick up a van blasting constant radar down the road.. Boy was I wrong.. My V1 didnt go off until 200 feet in front of the van and I made a few U turns and kept passing the van over and over and same spot it would go from 1 bar (200 feet out) to 4 really quick (150 feet out) .. BTW it was blasting KA, normally I can pick up speed signs blasting K a mile away along with high patrol blasting KA from their cars a mile away and thats with someone pulled over and its reflecting off their car and bouncing back. But what makes this radar van different? Is it just shooting at a limited range to rule out possibility of another car interfering with it?