For the longest time, subway stations were represented by a singular symbol "M" on most map apps. I just realized recently that since iOS 9, apple map has been showing the footprints of the stations in faint pink, and individual exits in little orange dots, like in this screen shot:
Even though these are 2-D, this additional layer of information is in line with the goal of Project Subway NYC, which is to understand the subway stations not as a single point in space, but as part of a network that branches to various destinations in the city. So now if you have an iphone, you don't have to rely on MTA's neighborhood maps alone. Pretty neat, pretty neat!