J/Z (New York City Subway Service)

The J Nassau Street Local and Z Nassau Street Express (earlier Jamaica Express) are two rapid transit services of the B Division of the New York City Subway. They are colored terra cotta brown, since they use the BMT Nassau Street Line in Lower Manhattan.

The J runs at all times, while the Z operates only during rush hours in the peak direction; both services use the entire BMT Archer Avenue Line and BMT Jamaica Line between Jamaica Center – Parsons/Archer in Jamaica, Queens and Lower Manhattan via the Williamsburg Bridge between Brooklyn and Manhattan. On weekdays, trains run express in Brooklyn between Myrtle Avenue and Marcy Avenue in the peak direction, bypassing three stations. During rush hours also in the peak direction, the J and Z form a skip-stop pair east of Myrtle Avenue.

During weekdays, the J and Z run to/from the southernmost station on the Nassau Street Line, Broad Street, but the J is cut back on weekends to/from Chambers Street. Thus, Broad Street and Fulton Street are two of the five stations that are not served full-time (the others being the two stations of the IRT 42nd Street Shuttle, and the seasonal Aqueduct Racetrack station on the IND Rockaway Line).