Phase 2 will extend the line north from the 96th Street station to the Harlem–125th Street subway station at Lexington Avenue. North of 120th Street, it will be constructed through the use of TBMs. The TBM Launch Box will be located between 121st Street and 122nd Street on Second Avenue. The TBMs will head north under Second Avenue to 118th Street before turning slightly east to curve under the East River Houses, turning west on 125th Street, crossing Lexington Avenue, before ending either east of Lenox Avenue or to the west of Lenox Avenue to accommodate storage tracks. The line is designed as to not preclude the construction of a station at Lenox Avenue and the extension of the line west along 125th Street.