Starfield:NAT
From Starfield Wiki
The New Atlantis Transit or NAT is the rapid transit system of New Atlantis. It serves 4 stops: Spaceport, Commercial District, MAST District, and Residential District.
In game, a train is always present at every stop, and the player can select a destination by activating it. This triggers a short cutscene followed by a loading screen, then the player reappears next to the train at their destination. It is not possible to enter the train car in game, but the inside can be glimpsed during destination selection.
The NAT has a single track, and trains are made up of a single car. It appears to run vertically between the Spaceport and Commercial District stops.