In case you’re feeling as braindead as I am this morning, a quick hit: footage of the NYC subway from 1905. The IRT subway (Short for Interborough Rapid Transit) opened in 1904 and ran from City Hall to 145th Street. This clip shows the train moving through several stations, with riders running to catch the train.
In 1940, the city took over operations of the IRT system, and it now operates as the A division of the NYC subway (lines 1, 2, 3, 4, 5, 6, 7 and the Times Square/Grand Central Shuttle). In 1945, the IRT’s crown jewel, the City Hall station, was shut down. I checked it out with with the New York Transit Museum in 2011, and now you can stay on the downtown 6 train from the Brooklyn Bridge-City Hall stop as it makes its loop back around through the ghost station.