Port Authority Abstraction

I saw these boards in the vestibule where the elevators & payment info are in the Port Authority. I have no idea what they are, or what message/information they are communicating (or who for) - but I was struck by the abstract minimalism and variance in composition and execution. 

They all remind me of some of Cy Twombly's work... 

I guess you never know where inspiration will strike – like the 5th floor of the massive and complicated maze that is Port Authority.