I was driving home from school today, and I saw a gathering of traffic lights. On both sides of an intersection, there were large groups of traffic lights dangling on a wire. Like, maybe 10 or twelve on each side. So, my first thought is that they were playing "Red Light Rover". But then I thought that they probably weren't, since there was no way for them to a) cross the street and b) try to keep other traffic lights from breaking the chain. So I pondered what could be going on.