Huh? You talking about the normal subway or the Worm Subway? From a few episodes and CEOSS, I'd think the SS subway station wouldn't be that close to the Fix-It-Shop.
If my memories are accurate... When the cast headed up by Olivia get back onto the main street from the ice-skating trip, they all come in from the right (our right) side of the screen, spilling out onto the familiar landmarks of their home. That makes me think the subway station entrance is located off to that side of the stage, stage left if you will... Maybe across the street? After all, rounding the corner past Big Bird's nesting area you have a few more apartments, the Furry Arms Hotel, Finders' Keepers, the Dance Studio, and the playground.
And then there's the SS Hospital, with its Fairy Tale wing... And the Storybook Community School... Both added in Seasons 34 and 36 respectively.