HOW PHOTO RADAR WORKS

Most photo radars operate on Ka band, but there are exceptions. Unlike ordinary radar traps, ambushes hidden within terrain contours, photo radar operates out in the open, usually in a van parked along the road, but occasionally as a permanent installation that looks much like a red light camera.

Instead of hiding, photo radar uses a low-power beam which it angles across the road to reduce the range at which it can be detected. So warning range is short, too short if you have a weak detector. Valentine One readily detects photo radar. But it will be reported for what it is, a weak signal. All bogeys, even weak ones, should be identified before they are dismissed.