Arizona had a rule in place that basically said the automated system had to photograph the car, rear plate and driver - and the driver had to be clearly recognizable. If you look up the "monkeyman" or similar - there was a guy that always wore a monkey mask and ran up about $35,000 worth of "un-enforceable" tickets on the 101 loop in Phoenix. State legislature eventually made it illegal to put the speed cameras on any state routes - pretty much ended that mess. There was also a problem where most of the law enforcement entities had told their guys that for "everyday driving", 10 miles over the limit was OK (for them not me). Cameras kept sending them tickets ......so finally the auto cameras had to be "re-set" to 11 miles over the limit as the trigger point - so our customary 10 was OK.