Traffic-light cameras cleared of evidence-gathering role

Cameras mounted above traffic lights are designed to keep traffic moving rather than to collect evidence for police, according to Engadget. The devices send data to automated signal systems that decide when lights change, and they can override those timings to ease congestion. They can also alert first responders when a crash occurs and log traffic patterns over time so planners can adjust roads. The report, published 9 Nov, does not give figures for how many such cameras are in use.