The IND Crosstown Line or Brooklyn–Queens Crosstown Line is a rapid transit line of the B Division of the New York City Subway in Brooklyn and Queens, New York City, United States. It provides crosstown service between western Brooklyn and northwestern Queens and is the only subway line that does not carry trains to and from Manhattan. Extent and service The following services use part or all of the IND Crosstown Line, whose services' bullets are colored lime green: The only service to use the Crosstown Line is the . The line north of Court Square has not been in regular use since 2010. The north end of the Crosstown Line is a flying junction with the IND Queens Boulevard Line and 60th Street Tunnel Connection just south of Queens Plaza. The line then travels south as a two-track line, except for a center relay track south of Court Square. At the turn from Marcy Avenue to Lafayette Avenue, two center tracks appear, merging into one after crossovers to the main tracks. These tracks were to be used for a split to another line in a 1931 expansion plan. This center track continues through Bedford–Nostrand Avenues and then ends with crossovers to the main tracks, but space remains in the center through Classon Avenue for the third track. At Hoyt–Schermerhorn Streets, the Crosstown Line passes through the middle of the four-track IND Fulton Street Line. Cross-platform interchange is available between the lines, but no track connections exist. After Hoyt–Schermerhorn Streets, the line turns south and ends as a merge into the local tracks of the IND Culver Line, just south of the split of that line into local and express tracks. History Development and 20th century Plans for a crosstown subway line were floated as early as 1912. In 1923, a plan for such a line, to be operated by the Brooklyn Rapid Transit Company (BRT) from the Queensboro Bridge under Jackson Avenue, Manhattan Avenue, Roebling Street, Bedford Avenue, and Hancock Street to Franklin Avenue at the north end of the BMT Franklin Avenue Line, was adopted by the city. However, the following year, Mayor Hylan announced his opposition to it. In addition, residents of central Brooklyn, which was already heavily developed, opposed an elevated line because of noise and aesthetic concerns, but the BRT would not build a subway because an elevated was the cheapest option. Eventually, the line