After waiting a moment for the mechanisms to do their work, you step out of the elevator onto the level of the station dedicated to the north-south regional. The ceilings seem higher than they should be, given how far underground you are, but it's cavernous in here. Beyond the two outer edges of the platform are the rails that carry the flow of north- and south-bound regional lines. It's empty down here. Looks like it's been under construction for a long time. Were these lines ever running? You can't remember the last time you were on this line.