I was once flashed by a forward facing Truvelo on the A14 road that connects the A1M to the M11, a dual carriageway (now controlled by average speed cameras). I was not exceeding the limit but was being overtaken at the time. I logged the details and waited for the NIP. Nothing came so I can assume that either there wasn't any film or the camera decided which vehicle was speeding.

The sensors are not always aligned correctly. On the A697 the Coldstream road from the A1 to the A68 towards Edinburgh there a several fixed cameras, Gatso I think. This is a good road and progress can be made when it is quiet so knowing the location and direction of cameras is useful. I did and would regularly pass a camera while travelling in the opposite direction at speed and the camera would flash, obviously taking a picture of nothing or my rear wheels. Nothing ever came of it. I did hear that the locals were so against the cameras that whenever they were reloaded with film the locals would drive, at speed in the opposite direction time and again to use the film up on nothing. Maybe an urban myth but the cameras seem to have sustained some damage through fire, bullets etc.

As the others have said though. Try to see the photos, but if it is you then pay and look big.

Cheers Concrete