name some of the stations ?
: Stations are located throughout the boroughs of Manhattan, Brooklyn, Queens, and the Bronx
New York City Subway
 Stations are located throughout the boroughs of Manhattan, Brooklyn, Queens, and the Bronx.

when did the subway open in new york 1904
wiki:19918496
New York City Subway [SEP] Introduction
These lines have three or four tracks. Normally, the outer two are used by local trains, while the inner one or two are used by express trains. Stations served by express trains are typically major transfer points or destinations.