Spain has had them for a while, but they have disadvantages.

The main reason we want to wait for red lights isn't that it'll illegal: It's because it's indicating that not stopping is quite dangerous. Keep going, and you can get sideswiped, or you'll go over a pedestrian. Ignoring red lights in those situations, which are 90% of situations, is going to make you find out pretty soon.

But then there's red lights that aren't really telling you there's a clear and present danger. Red lights in one way streets, to one way streets, with great visibility. Crossings in streets designed for rush hour traffic that don't have very different timings for the middle of the night. Or maybe the time where a theater finishes their night production, and the traffic patterns have nothing to do with the lights. In those cases, people are often rewarded by ignoring the red light, because yes, it's not indicating risks accurately. And the more you train people that yes, there are red lights that are safe to ignore, the more they'll consider ignoring others that are unsafe.

So those red lights that just change when you are speeding, but don't indicate that a different direction is passing through are doing nothing but telling the speeding driver that if they are caught, they'll get a much bigger fine, because other than for the fine, speeding past that light is not really any more dangerous than the speeding they were doing already. So it works for some people, but it also makes others more dangerous drivers.

I love this idea. Traffic cameras are so sketchy in the US. It’s always contracted out on extremely favorable terms for the contractor. It’s often a very kick back bribery feeling.