Nathan at FlowingData.com posts a nice collection of traffic mapping examples.

Explorations of real-world traffic

Traffic visualizations,mostly in the form of geographic maps,have been popular lately. Governments and organizations have been releasing lots of GPS data,and as a result,we get to see some impressive animations and explore some slick interactives.

We don't often get to see how cars,trains,subways,airplanes,etc move in physical space,because,well,we're usually in them,so it's always interesting to see the big picture. The activity …[...]