The Chrystie Street Connection is a New York City Subway junction running the length of Chrystie Street on the Lower East Side of Manhattan. It is one of the few track connections between lines of the former Brooklyn–Manhattan Transit Corporation (BMT) and Independent Subway System (IND) divisions, which together constitute the system's B Division. A major branch of the IND Sixth Avenue Line, it connects the Sixth Avenue Line to the BMT Brighton Line and BMT Fourth Avenue Line via the north side of the Manhattan Bridge and to the BMT Jamaica Line over the Williamsburg Bridge. The project, opened in 1967 and 1968, also includes the Sixth Avenue Line's Grand Street and 57th Street stations, the latter of which is not part of the connection itself.