[j3097736]

I don't know about the US, but where I live speed camera are relatively large bright colored boxes with reflective stripes on the side of the road, with mandatory "speed camera ahead" warnings.

Most of them are empty but people unfamliar with the place will usually slow down.

[jakeogh]

The laws are state and local. In AZ it's a city or township, then the people put it on the ballot and it gets shut down. Tucson voted 65% no cameras, and later we got a state wide ban on highways, so it's a still a work in progress. The tickets are civil law, so you can throw it out, frame it, or make a coffee table book if you get enough:)