A 'duh' moment

The FAA has spent so much time and money to avoid runway incursions (with not THAT much to show for it), that I've often wondered why they don't just put traffic signals at the intersections of runways and taxiways?

Now, according to the New York Times, that's what the FAA is going to do:

The system will have a computer that determines when a runway is in use, and then turns on red lights embedded in the pavement at each intersection. Thus it would help address errors by pilots and by controllers at the 20 airports, which include Kennedy International Airport and Newark Liberty International Airport but not La Guardia Airport.

I suspect it will work as long as some pilot doesn't shoot out the lights.