6 (BMT rapid transit service)

6 was the BMT's designation for trains that used the BMT Fifth Avenue Line (labeled the Fifth Avenue–Bay Ridge Line).

When numbers were assigned in 1924, 6 was assigned to trains between Sands Street (on the Brooklyn side of the Brooklyn Bridge) and 65th Street, via the BMT Myrtle Avenue Line, BMT Third Avenue Line, and BMT Fifth Avenue Line.

Between 1931 and 1937, all service except rush hour and Saturday morning service was truncated to 36th Street, where transfer could be made to a Culver Line (5) train to downtown Brooklyn. On May 31, 1940, the Third Avenue and Fifth Avenue lines were closed, ending all 6 service.

References

M (New York City Subway service)

The M Sixth Avenue Local is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored bright orange since it uses the IND Sixth Avenue Line in Manhattan. On weekdays, the M operates between 71st Avenue in Forest Hills, Queens, and Metropolitan Avenue in Middle Village, Queens, via the IND Queens Boulevard Line and Sixth Avenue, the Williamsburg Bridge, and the BMT Jamaica and Myrtle Avenue lines. This makes the M the only service that travels through the same borough via two different, unconnected lines.

The M short turns at Essex Street in the Lower East Side of Manhattan on weekends, and at Myrtle Avenue – Broadway in Brooklyn during nights. The M is the only non-shuttle service that has both of its full-run terminals in the same borough (Queens). The 71st Avenue and Metropolitan Avenue termini of the M route are 2.47 miles (3.98 km) apart, marking this as the shortest geographic distance between termini for a New York City Subway non-shuttle service.

IRT Flushing Line

The IRT Flushing Line is a rapid transit route of the New York City Subway system, operated as part of the A Division. Originally an Interborough Rapid Transit Company-operated route, the Flushing Line, as originally built, ran from Flushing, Queens, to Times Square, Manhattan; a western extension was built to Hudson Yards in western Manhattan, 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 shown in the color raspberry on station signs, the official subway map, internal route maps in R188 cars, and route signs on the front and sides of R62A subway cars. Before the line was opened all the way to Flushing, it was known as the Corona Line or Woodside and Corona Line. Prior to the discontinuance of BMT services in 1949, the portion of the IRT Flushing Line between Times Square and Queensboro Plaza was known as the Queensboro Line.

The Flushing Line has various styles of architecture, which range from steel girder elevated structures to European-style concrete viaducts. The underground stations have some unique designs as well. The designs include Hunters Point Avenue, which is in an Italianate style; Grand Central – 42nd Street, which is a single round tube similar to a London Underground station; and 34th Street – Hudson Yards, which, with its deep vault and spacious interior, resembles a Washington Metro station.