This mod adds around 200 interiors for the metro cars littering the tunnels of the D.C. metro.
The cars can be entered through the four doors located on the sides of the carriage, providing they are not blocked by rubble.

UPDATE 2.5
Added 3 new Metro Cars below Bethesda ruins, 1 car above ground at Arlington Cemetery.
Moved a few door markers and rubble to stop the player sometimes getting stuck.
Monorail interiors now included at the following locations:
Car Fort in the Northwest
Wreckage Southwest of Roosevelt Academy
West of Oasis
3 of 4 of the cars East of Germantown (Raider Camp)
North of Arefu (yes, I got the idea of the rope ladder from a Busworld Screenshot)

To upgrade from earlier versions, just replace the esp. This Version now has a texture folder called Metro Textures, which should go in the Texture folder.

Whilst every car has the same design, the contents of each is unique, right down to the arrangment of litter on the floor. Although many cars are quite unremarkable, others may contain valuable items, chems, ammo etc.
Some carriages are inhabited and cars in raider controlled stations are now often used by the raiders themselves.
Carriage interiors match the angles and directions of the exteriors.

For anyone who downloaded my earlier 'metrohome' mod, this will not work alongside it as this mod contains a modified version in a different location.
I have tested with followers and although there were no major problems, the cramped conditions can cause difficulties for them.