Ever wonder why traffic lights are red, yellow, and green -- and how to beat them? Audi has you covered.

[youtube=http://www.youtube.com/watch?v=YxxrhRT4daI&w=600&h=315]

I've long been amazed by traffic lights. That seems like a pretty dumb thing to say, for sure, but think about it: in a world where daily life can be incredibly chaotic, how did we manage to implement a system based off of three colors that (most) everyone seems to understand and respect? I…