Most modern cars are full of technology of one sort or another. A simple addition to a car would allow the car to communicate with traffic signals. Why not reward people for their good driving?
A person who stays within the speed limit gets priority for the traffic signals. A person who speeds, gets hit with traffic signal hell. I understand that sometimes a speeder would get through a light on the coattails of the good driver, and am willing to live with that.
Maybe on peoples birthdays, the lights are always green?
Certainly something to be fleshed out.