Discussion relating to the past and present operations of the NYC Subway, PATH, and Staten Island Railway (SIRT).

Moderator: GirlOnTheTrain

  by Passenger
 
Here is a picture of it:
http://nycsubway.org/perl/show?122813

How is it used?
Also, I cannot tell from the picture if that little crane is part of it or behind it.

Thank you.