I disagree about everyone jumping the gun. In most places I've been, both rural and city... there are far more slow, hesitant people than overly quick people, when it comes to going when the light turns green. Some people think that they need to wait a second before going, to observe the clear intersection. My answer to them, is they should have been observing the intersection during the entire time the light was red. Then there'd be no need to hesitate when it turns green.
I still like the traffic light idea, though. I support that at least.