More Help in Defending Red Light Camera Violations
As it turns out, these cameras tear up. They "[fall] out of synchronisation." That's why you need to insist on having someone from the camera company at your hearing so they can testify as to when the last synchronisation check took place. This article shows that multiple cameras have been removed from a single highway because of this problem. That would seem to indicate a high probability that a lot of these cameras are simply screwed up.