114th Street
114th Street is the street that borders the southern end of the main quad of campus. The street is officially West 114th Street west of Lenox Ave (6th Ave). However, East 114th Street doesn't really exist, as east of Lenox Ave, housing projects occupy the blocks between 113th and 115th streets for almost the rest of the island. Only for one block does East 114th St run: between 1st Ave and Pleasant Ave (essentially FDR Drive).
West 114th Street is also a major street for campus housing, as six of Columbia's residence halls and eleven of its brownstones are located on the street.