The inspiration behind 'this is the subway'

I created a collection of prints called Metropolis in the summer of 2018 and recorded a series of narrated posts in instagram stories to address the inspiration behind each print. See below for links to the prints or click into the stories
(now on Vimeo). This story tells important facts and asks people how much they know about the system.
There are 27 different lines
There are over 6000 cars used daily
There is over 840 miles of track. Thats like getting on a subway in Brooklyn and getting off in Atlanta.
I asked people in Brooklyn who had the biggest subway system in the world.