A physical network diagram database for the New York City subway system, covering Division A (IRT), Division B1 (BMT), and Division B2 (IND). Station data is organised by line chain and build route, with engineer's chain distances, build era, CBTC status, and station setup type.

Station data compiled from NYCT engineering records, signal diagrams, and field research. Chain distances based on engineer's chain notation (1+00 = 100 ft), measured from the north end of each station.