Th source, unfortunately, was a link from HN a few years ago. IIRC it was either Phoenix, AZ or somewhere around that area that started playing with reactive re

Th source, unfortunately, was a link from HN a few years ago. IIRC it was either Phoenix, AZ or somewhere around that area that started playing with reactive red light cameras. Essentially, it would watch for speeders prior to the intersection, and it would turn red before you could legcally cross the intersection. Then, it would ding you for a RLV.