The BBC has a really neat series called Britain from above.
Using GPS, data streams, and other modes of tracking, and then super-imposing some really neat visualisations on to maps of the United Kingdom, they have created these superb videos of the 4 modes of traffic. Air, sea, road, and the information superhighway.
I especially enjoy the way the cross-channel ferries dart and dodge through the main traffic flowing up and down the English Channel.
I hope you enjoy the videos. Please do let a comment expressing your thoughts.
Air Traffic over Britain
Ship traffic in the English Channel
Taxi traffic in London
Data traffic to/from the United Kingdom