I have never been a fan of robots enforcing traffic laws. But so far, tickets coming in the mail, nobody is getting shot.
Now I do have ideas about how cameras at all light controlled intersections could reduce accidents. Now, every time both drivers swear they had green. If there was a video of wreck, let them swear. Us video as witness, both to civil case about who pays for damage, but also criminal case for perjury. Sureness of penalty would increase caution.
BTW, cost of running the cameras would be paid by mailing fines for littering.