A lot of places in the US have tried out automated speed traps and red light cameras. Some still use them AFAIK.

But what's common is that infractions are so widespread that there's a massive backlash and the programs get cancelled. There was an automatic speed trap on the interstate just south of Pittsburgh a few months ago, set up along side some temporary construction with reduced speed limits. A few weeks later there was a headline that it had generated so many tens of thousands of tickets that they were considering it an error and throwing out the tickets.