Exits

Station mezzanine

This station has a full-length mezzanine above the platforms and tracks with staircases to each side at regular intervals that connect the two fare control areas. The full-time one is at the north (geographical east) end. It has a turnstile bank, token booth, two staircases going up to the western corners of Nostrand and Lafayette Avenues, and two more staircases going up to the eastern corners of Nostrand and Lafayette Avenues that have since been boarded up.^[9] The fare control area at the south (geographical west) end of the mezzanine is unstaffed, containing just full height turnstiles and staircases to all corners of Bedford and Lafayette Avenues.^[10][11][12] However, the two staircases on the western corners have been boarded up.^[12] They had been previously exit-only. A gate seals off the passageway towards the stairs.

Middle track and expansion provisions

G train on southbound track

The middle track is used for storage of rush hour trains, or for maintenance and refuse trains. West (railroad south) of this station, the center track has switches to the two outer tracks before ending at a bumper block, while the trackway continues into Classon Avenue. East (railroad north) of the station, the middle track splits into two tracks that ramp down under the outer tracks before those tracks curve north. The tail tracks continue to Marcy Avenue and end at bumper blocks.^[11][13][14] A signal and switch tower is located in the tunnel north of the station, staffed during rush hour and midday service, but primarily used during construction reroutes if trains need to be terminated at the station.^{[15][16][17][18]}

Unused in regular service, the middle and tail tracks were originally intended for an unbuilt extension proposed in the IND Second System. Not part of the first official plan in 1929, it was proposed by the city Board of Transportation on October 12, 1930 as an addition to the original plans.^[13][19] The plan was for a line to continue east along Lafayette Avenue to Broadway (at Kosciuszko Street of the BMT Jamaica Line), then northeast along Stanhope Street to a junction with the BMT Myrtle Avenue Line and a planned IND Myrtle-Central Avenues Line along Myrtle Avenue (between the Central Avenue and Knickerbocker Avenue stations). The IND would then run east along Myrtle Avenue past the Myrtle El, then along Central Avenue in Queens (distinct from the Central Avenue in Brooklyn) to 73rd Place and Cooper Avenue in Glendale, Queens, adjacent to the Long Island Rail Road's Montauk Branch. The line would have likely continued along or parallel to the Montauk and Rockaway Beach Branches of the LIRR to Rockaway Beach and Far Rockaway.^{[13][19][20][21]} Upon completion of the extension, the center track would have been used to terminate short-run trains, or to provide an additional track to hold trains during peak hours.^[19]

Following the construction of the subway, Banneker Playground was created atop the line's curve from Lafayette Avenue onto Marcy Avenue.^[22]