My husband responded to my confusion and woe trying to understand Union Square station by doing in two hours what the MTA will not, and creating a tactile map of the place. This is a prototype but it only took a few minutes touching and talking it through to build a mental model.
ALT A 3d model of Union Square station with no labels but showing stairs, fare arrays, corridors and mezzanines in white filament. It's stuck to a glass printing plate with a wooden surface showing underneath.