Been awhile since I've watched this - but just recalling that it has train content and is train related. Pretty good film - I found it interesting.
If you don't like graffiti or urbanites - you might not like this film.
https://en.wikipedia.org/wiki/Dark_Days_(film)
Dark Days is a documentary feature made by British filmmaker Marc Singer, shot during the mid-1990s but not completed and released until the year 2000. The film follows a group of people living in an abandoned section of the New York City underground railway system, more precisely the area of the so-called Freedom Tunnel.
During filming, Amtrak announced they would be forcibly evicting the homeless living in the tunnels in order to reroute their trains through the tunnel. This announcement, plus the police presence backing the decision, prompted Singer and photographer Margaret Morton to go to the Coalition for the Homeless for help. Eventually, Singer and Morton managed to secure housing vouchers from the Department of Housing and Urban Development for the film's subjects, which enabled them to move out of the tunnels and into their own apartments.
