Use of exit 1 for a
starting terminus is NY is
not without precedent. Signing NY 9A down the ramp from FDR Drive (as it's inventoried) is odd, but maybe that's to keep trucks off FDR Drive. In any case, this feels like the start of a rabbit hole... if one were to extent NY 9A because of that, then you'd also have to move
NY 324, add the truck routes back (including the ones that were pending a decision on what to do with them), add
Business NY 25A (not recognized by the state but nonetheless signed, just like the truck routes; I think even the bannered US routes, with the exception of Business US 62, are the same way, but at least they're on a combination of touring routes and reference routes), and possibly extend a couple parkways. It's basically a complete change to how we've been dealing with NY to date.
EDIT: And yes, it can be interpreted as 1PPI - especially as the inventory has it as a ramp from FDR Drive. I also feel like how NY 878 is handled probably has bearing here, for consistency, unless we decide to declare 1PPI.