High Quality Content by WIKIPEDIA articles! The Brooklyn–Manhattan Transit Corporation (BMT) was an urban transit holding company, based in Brooklyn, New York City, United States, and incorporated in 1923. The system was sold to the city in 1940 and today, together with the IND subway system, form the B Division of the New York City Subway. The original BMT routes form the J, L, M, N, Q and R trains, as well as the Franklin Avenue Shuttle, with the ex-IND B, D and F using some former BMT trackage in Brooklyn, as does a short section of the A in Queens. The M train enters the IND via the Chrystie Street Connection after crossing the Williamsburg Bridge. The Z train supplements the J in the peak direction during rush hours only.