As a non-driver living in the urban lifestyle in the concrete jungle, traffic always interests me. NewScientist has a short video on a study performed in Japan that looks at the cause of traffic jams that seemingly have no cause. The study proves that there is indeed a cause, but it's not an accident; it's a result of the drivers simply driving.
The lesson: There is no traffic jam and yet you ARE the traffic jam. ooOOoo!