Use LEDs to show when traffic light is about to change

While it is true that red-light cameras increase, not reduce, intersection accidents, there is a device that would reduce them: Add a vertical strip of white LEDs along side the colored lights. When the light changes, all of the LEDs come on, and then go out one by one from top to bottom. When the last LED goes out, the colored light changes, and all the LEDs come back on and count down again.