The Atlantic Avenue–Barclays Center station (formerly Atlantic Avenue/Pacific Street station) is a New York City Subway station complex shared by the BMT Fourth Avenue Line, the BMT Brighton Line and the IRT Eastern Parkway Line, located at Atlantic, Fourth, and Flatbush Avenues and Pacific Street in Downtown Brooklyn. The complex is served by the 2, 4, D, N, Q and R trains at all times; the 3 train at all times except late nights; the 5 and B trains during weekdays; and a few rush-hour W trains. As of 2019, it is the busiest subway station in Brooklyn, with 13,939,794 passengers, and is ranked 20th overall. The control house has been listed on the National Register of Historic Places since 1980, while the station complex as a whole has been listed on the National Register of Historic Places since 2004, and is ADA-compliant. From Wikipedia