travel There's a locked door in the "neon flats"

[IlComico]

There's a locked door in the "neon flats" and I really think someone needs to open it...
Because the beauty of Bethesda games is never knowing what adventure can hide behind a door.

"I think that originally the mod had to be structured differently, that is, the events all took place in that building where the character found himself in a sort of loop in going up and get off."

"20 Leagues Under the Sea" has already been almost 100% restored, but the lore is missing and the access is also not the most lore friendly.
The purpose of Vault 120 was to create an elite government/society that would control the world from the bottom of the sea.
She would have moved through "submarine" subways which were metaphorically and literally the only physical contact with the outside world. We can therefore conclude that in addition to the institute, many other groups have tried to isolate themselves and create their own ideological and social paradises. The Vault Dweller will now be able to use Vault 120 as a point from which to travel to various stations (with Subway Tokens) or build them! (connecting Vault 88, Vault 101, a stop on the Nuka World monorail, or even a secondary access to Nuka World!) By unlocking it in story progression and using resources.
Honestly, I find Goodneighbor the cemetery of cut content, the Neon Flats is located not far from the Third Rail, I think that the third rail has been greatly resized, there are good mods to liven it up but the best thing is to make Magnolia a unique settler that increases the happiness and abandon that bare and forgotten country, difficult and boring to reach it in survival.
In conclusion I think that unlocking access for fast travel to Goodneighbor is the most balanced position, as well as creating accesses that connect Noir penthouse and other points notoriously "surrounded" by enemies safely and quickly.
(The station could also be connected to Salem and Cabot's house to imply that all families and groups were included in the vault 120 project.)

[IlComico]

I thank @tenhats 

thank you, your work has already reached 2000 downloads

I wish you the best and to be able to expand it, always remembering the friendly lore.