Bung: A few years ago Wellington's parking enforcement tried a camera car that could just drive around taking photos of cars on yellow lines, on footpaths, double parked etc and produce tickets by the score. That experiment didn't last long. The opposition to rigid enforcement became a local political problem for the councillors. No regime is perfect, most need some flexibility to be accepted.
Automated parking enforcement is becoming more common, the reality is this is where things are heading, and fast. ANPR cameras are being widely used by many local authorities.