Via Urban Tick, a visualization of the Washington DC transit system. “Developed by Rahul Nair in Processing. It is visualised in processing with a data set from WMATA transit system. The transport network has made their dat available trough the open Google Transit Feed Specification (GTFS).” Cool representation.
Washington D.C. Transit from Rahul Nair on Vimeo.
Check out another timelapse of transit usage for a 24 hour period here