This underground station opened on September 10, 1932, as part of the city-operated Independent Subway System 's initial segment, the Eighth Avenue Line between Chambers Street and 207th Street. There are four tracks and two side platforms. The two center tracks are used by the Aexpress train during daytime hours. Just north of this station, a storage track begins between the two express tracks. This track runs north and stub-ends at the south end of the center platform at 34th Street – Penn Station. Both platform walls have "23RD ST." name tablets in a yellow background and "23" in white numbering on a black border. There are also directional signs in the same format. The platform columns are yellow with every other one having the standard black and white station signs. The station is planned to be renovated as part of the 2010–2014 MTA Capital Program. An MTA study conducted in 2014 found that 40% of station components were out of date.
Exits
All fare controls are on platform level. The full-time ones are at the south end of the station, at 23rd Street. Each entrance/exit has a turnstile bank, token booth, and two staircases to the street. The northbound side leads to either eastern corner of 23rd Street and Eighth Avenue and the southbound side leads to either western corner. A crossunder within fare control at the 23rd Street end connects both platforms. Each platform has an exit-only at the center, at 24th Street. Two High Entry-Exit Turnstiles lead to a small mezzanine, where a single staircase goes up to the streets. The northbound side leads to the southeast corner of 24th Street and 8th Avenue, and the southbound side to the northwest corner. Both platforms have another fare control area at their north ends, at 25th Street, that require going up a short flight of stairs to reach. Though open at all times, they are unstaffed, containing no token booth and just HEET turnstiles. Each entrance here has two street stairs, the northbound side to either eastern corner of 25th Street and Eighth Avenue and the southbound side to either western corner. The crossunder here is closed.