Per Bobby Allyn of NPR:

Deaths caused by motorists running red lights has risen to a 10-year-high, a newly released study finds.

I would assume that those ubiquitous red light cameras aren’t working to keep people safer. AAA came to the opposite conclusion:

AAA recommends putting red light cameras in areas that have a pattern of crashes, with local law enforcement officials directly supervising the cameras. “Camera enforcement is a proven way to reduce red-light running and save lives,” said Jessica Cicchino of the Insurance Institute for Highway Safety.

I guess so, but I bet the squad car “enforcing” the red light camera is the actual effective agent.