BMT Nassau Street Line

The BMT Nassau Street Line is a rapid transit line of the B Division of the New York City Subway system in Manhattan. It is served by the J and Z trains which are colored terra cotta brown on maps and signage. The line is a continuation of the BMT Jamaica Line in Brooklyn after crossing the Williamsburg Bridge; it continues to a junction with the BMT Broadway Line just before the Montague Street Tunnel after which the line reenters Brooklyn (no revenue service south of Broad Street since June, 2010).

The line is served at all times by the J train, although on weekends, the two southernmost stations are closed. The Z provides supplemental rush hour service, operating in the peak direction.

While the line is officially recognized as the Nassau Street Line, it only serves one station on Nassau Street: Fulton Street.

The M service has historically served the Nassau Street Line. Since June 27, 2010, the M has been rerouted via the Chrystie Street Connection to run on the IND Sixth Avenue Line, as a replacement for the V. The M continues to serve one Nassau Street Line station: the Essex Street station.