Like I said above, the cameras do not tcket people, they tcket cars, and for me that opens up a big problems. As the car owner, it becomes your responsibility to prove your innocence. Our judiciary system is based on the opposite. In a family with a number of drivers, you may not remember who was driving the car at that time, and even so, shoud you be forced to testify against a family member. The camera, the locality, nor the camera owner, however, are not compelled to prove your guilt.
There is also the matter of allowing private companies to do the policing, especially for profit.