79th Street was served by both the 1 and the 9. Skip-stop service ended on May 27, 2005, as a result of a decrease in the number of riders who benefited. In 1979, the New York City Landmarks Preservation Commission designated the space within the boundaries of the original station, excluding expansions made after 1904, as a city landmark. The station was designated along with eleven others on the original IRT. The original interiors were listed on the National Register of Historic Places in 2004. Station layout Like other local stations, 79th Street has four tracks and two side platforms. The two express tracks are used by the 2 train during daytime hours and the 3 train at all times. The platforms were originally long, as at other local stations on the original IRT, but as a result of the 1958–1959 platform extension, became long. The station was also originally wide. Design As with other stations built as part of the original IRT, the station was constructed using a cut-and-cover method. The tunnel is covered by a "U"-shaped trough that contains utility pipes and wires. The bottom of this trough contains a foundation of concrete no less than thick. Each platform consists of concrete slabs, beneath which are drainage basins. The original platforms contain circular, cast-iron Doric-style columns spaced every , while the platform extensions contain I-beam columns. Additional columns between the tracks, spaced every , support the jack-arched concrete station roofs. The ceiling height varies based on whether there are utilities in the ceiling; the areas without utilities is about above platform level. There is a gap between the trough wall and the platform walls, which are made of -thick brick covered over by a tiled finish. The fare control areas are at platform level, and there is no crossover or crossunder between the platforms. The walls along the platforms near the fare control areas consist of a brick wainscoting on the lowest part of the wall, with bronze air vents along the wainscoting, and white glass tiles above. The platform walls are divided at intervals by buff and salmon tile pilasters, or vertical bands. There are tiled plaques about halfway up each pilaster, with the number "79" in white-on-green tile, and buff-and-salmon foliate designs around them. Atop each pilaster are buff faience plaques depicting two cornucopias around a shield. A cornice with egg-and-dart patterns atop bead-and-reel moldings run