Watch the Chaotic Beauty of New York City Transit

What does a day of operation look like for one of the world's largest transit systems? YouTube user STLTransit answers that question with a mesmerizing visualization of transit data provided by New York's Metropolitan Transportation Authority (MTA).

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The video was compiled through General Transit Feed Specification data and illustrates a day -- from 4 A.M. to 4 A.M. -- of transit operations.

Watch the video above for an incredible display of data visualization that looks a bit like a Lite-Brite time-lapse or thousands of fireflies scurrying in straight lines.

Image courtesy of Flickr, Alex E. Proimos

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