Hi I am the creator.
My cousin kindly asked his friend who works for the MTA for me, if my project is a problem for them... and the answer was something like "as long as the drawings don't show columns and/or any structural elements they are fine." My drawings are all meant to be diagrams and only show publicly accessible areas anyway. It's not like the terrorists can't go walk around and figure the stations out themselves if they want...
Not sure why this is downvoted? Do people not remember how for ~20yr "terrorism" was habitually used as a justification for "because we don't want to" by every government organization from the MTA to small town parks departments.
The New York bureaucracies favorite excuse for not doing work they are responsible for.