Quite an impressive combination of art, carto, sound, design and technology! In his Conductor project (www.mta.me), Alexander Chen
“turns the New York subway system into an interactive string instrument. Using the MTA’s actual subway schedule, the piece begins in realtime by spawning trains which departed in the last minute, then continues accelerating through a 24 hour loop. The visuals are based on Massimo Vignelli’s 1972 diagram.” (see http://blog.chenalexander.com/2011/conductor-mta/ for a full description of this fascinating map).
Thanks to Daniel Naud for pointing me to Chris McDowall’s blog which includes many interesting animated map including this one (Note: this map was already mentioned a few weeks ago on (e)space&fiction).