Alexander Chen animated the NYC subway map, with real data from MTA.
When a train leaves the station in the MTA dataset, it moves on Chen’s interactive map, drawing a line with the color of the train line.
When two train cross lines comes the music !
Each intersection causes a sound like a plucked nylon guitar string.
Written in HTML5, you will need an appropriate browser to enjoy (e.g. Google Chrome) : www.mta.me