The IRT Flushing Line is a rapid transit route of the New York City Subway system, named for its eastern terminal in Flushing, Queens. It is operated as part of the A Division. The Interborough Rapid Transit Company (IRT), a private operator, had constructed the section of the line from Flushing, Queens, to Times Square, Manhattan between 1915 and 1928. A western extension was opened to Hudson Yards in western Manhattan in 2015, and the line now stretches from Flushing to Chelsea, Manhattan. It carries trains of the 7 local service, as well as the express <7> during rush hours in the peak direction. It is the only currently operational IRT line to serve Queens. The IRT Flushing Line has been isolated from the rest of the IRT System since June 13, 1942, when the IRT 2nd Avenue Line was closed and the track connection was destroyed. Today, for the purposes of car swapping if necessary, complicated non-revenue movements must be performed by utilizing the BMT track connection at Queensboro Plaza Station.