The presidential metro can be used by the Lone Wanderer to traverse from the presidential sub level beneath the White House with Adams Air Force Base and the Capitol Building's east wing. An automated defense system is headed by a pre-ZAX technology computer system called Metro Authority Rapid Governmental transit System. M.A.R.Go.T. controls the trains, robots, and other maintenance personnel.
The metro can be activated by way of acquiring fuses from the destroyed presidential sentry bot or by killing the ghouls present. Once the ghouls are killed, the security breach will be considered cleared, and the presidential sentry bot will automatically replace the fuses. Reporting to M.A.R.Go.T will result in her reporting that the main repairs will now begin. The Lone Wanderer will then see the presidential sentry bot replace the fuse, enabling the metro.
Nuka-Cola Quantum in the equipment room, which connects the western and eastern lines.
A police hat can be found near M.A.R.Go.T. in the room where first encountered, and another by a skeleton by a caved-in area to the right when finding the ghouls.
A single mini nuke located in a half-buried train car at a tunnel dead-end.
Upwards of 20 pieces of scrap metal on shelves, in containers, and by the side of train tracks throughout the metro.
About halfway down the second tunnel, one can look through a fence and watch two feral ghouls get splattered by a metro train.
If the player character did not find the Senate employee ID, they can force the computer to reprogram with a high enough Science skill.
At the junction where the working metro can take one to Adams AFB, there are two locked doors requiring a key to enter. There is no key to be found, however. The doors open when the presidential metro bot is killed. More robots are found behind the doors, but no loot. If the presidential metro bot is shot in the combat inhibitor, causing it to frenzy, the other bots/turrets will attack it. However, the doors will not open.
Past the M.A.R.Go.T. computer entrance, at the end of the tracks there's a gnome with a camera and on the tracks, are two teddy bears tied to the tracks with a note saying 'Help Us' between them.
If one has a high enough Science skill or the Senate employee ID is found, M.A.R.Go.T. will report that the last time the metro line was in use was 200 years and 8 months before the current date.
The cutscene in which you travel through the subway on the train isn't actually a train. The game equips the player with a gloveas seen here in the GECK that resembles the inside of the train, with your player character running along the track at very high speed, simulating that you're moving through the subway on a train.
Occasionally, when the reaver is killed, it may fling back down the hall where it came from. [verified]
Reavers in this area may be affected by a physics bug that causes them to jitter and shake rapidly. This makes them very difficult to target and rounds often pass through them without dealing any damage, even inside VATS. This may be related to the aforementioned bug, as when killed they often fly some distance. Explosives still have full effect. [verified]
A garden gnome harassing teddy bears
A skeleton of a person that electrocuted himself
The terminal station for the self-automating M.A.R.Go.T. system of the metro
A view out of a tram-car on the presidential metro