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Fine pair of maps incorporated into a folding promotional broadsheet, showing two of the train lines in the New York area.
The Interborough Rapid Transit Company (IRT) was the private operator of the original underground New York City Subway line that opened in 1904, as well as earlier elevated railways and additional rapid transit lines in New York City. The IRT was purchased by the City in June 1940. The former IRT lines (the numbered lines in the current subway system) are now the A Division or IRT Division of the Subway.
The Brooklyn-Manhattan Transit Corporation (BMT) was an urban transit holding company, based in Brooklyn and incorporated in 1923. The system was sold to the city in 1940. Today, together with the IND subway system, it forms the B Division of the modern New York City Subway. The original BMT routes currently form the J/Z, L, M, N, Q, and R trains, as well as the Franklin Avenue Shuttle, with the ex-IND B, D, and F using 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, and the R train enters the IND via the 60th Street Tunnel Connection. The Z train supplements the J in the peak direction during rush hours only.