spend $3K and get the kind that is custom built into the bumpers and fenders connected to an LCD screen that points where the signal is coming from. this kind also senses the fluctuation in the ions in the air from previous scans. The manufacturers of this kind will pay any ticket that you get and they even set up lawers to fight your ticket in court so you get 0 points. They sell this at RKST by my house...wish I could get it
