Countdown counters are pretty common for pedestrians, letting them know how much time they have to cross. Drivers could use them too, and might even save a bit of time and energy if they were ready to roll when the light changed. Thanva Tivawong has designed this very clever interpretation of a traffic signal that could only work with LEDs. This is so much better than the tired old designs that have been around forever…. Read the full story on TreeHugger
The rest is here:
LEDs Make Clever Interactive Traffic Light Design Possible