This is already possible with traffic lights. Emergency Vehicles are equipped to switch traffic lights in their path to green. It's called Traffic Signal Preemption. Of course, the criminal penalties for abusing the system are pretty stiff...
As a child, I used to dream of such a device as I sat impatiently at traffic lights in the car (naturally asking my parents "are we there yet" every 5 seconds). I was pretty excited to learn that it is a real thing!
As a child, I used to dream of such a device as I sat impatiently at traffic lights in the car (naturally asking my parents "are we there yet" every 5 seconds). I was pretty excited to learn that it is a real thing!
http://en.wikipedia.org/wiki/Traffic_signal_preemption