The Interborough Rapid Transit Company (IRT) was the operator of the original New York Subway line that opened in 1904 and additional rapid transit lines in the City of New York.
The IRT was purchased by the City in 1940. The former IRT lines (the numbered lines in the current subway system) are now the IRT Division of the New York City Transit Authority, also known as the A Division.
The InterboroughRapidTransit Company (IRT) was the operator of the original New York Subway line that opened in 1904 and additional rapidtransitlines in the City of New York.
The former IRTlines (the numbered lines in the current subway system) are now the IRT Division of the New York City Transit Authority, also known as the A Division.