The F and <F> Queens Boulevard Express/Sixth Avenue Local are two rapid transit services in the B Division of the New York City Subway. Their route bullets are colored , since they use and are part of the IND Sixth Avenue Line in Manhattan. The F operates at all times between 179th Street in Jamaica, Queens and Stillwell Avenue in Coney Island, Brooklyn, making all stops except for an express section in Queens between Forest Hills–71st Avenue and 21st Street–Queensbridge. Some trains terminate at Church Avenue or Kings Highway. Two scheduled rush hour trips in the peak direction run express in Brooklyn between Jay Street–MetroTech and Church Avenue, making one stop in between at Seventh Avenue. This express service was introduced in September 2019. In Brooklyn, local service is denoted as (F) in a circle-shaped bullet while express service is denoted as <F> in a diamond-shaped bullet. From 1968 to 1976, the F ran express along the IND Culver Line in Brooklyn. The F also ran via the 53rd Street Tunnel until moving to the 63rd Street Tunnel in 2001. Since the 1990s, there have been calls to restore partial express service from Jay Street–MetroTech to Church Avenue, although this has been very controversial. The limited express <F> service between Jay Street and Church Avenue started on September 16, 2019, with two trains in the peak direction during rush hours. History 1940s and 1950s With the opening of the IND Sixth Avenue Line on December 15, 1940, F service began, operating as the line's Queens Boulevard service. It operated between Parsons Boulevard and Church Avenue via Queens Boulevard Line, Sixth Avenue Line, and the Culver Line. It ran express in Queens and local in Manhattan and Brooklyn. F trains provided an additional 24/7 express route in Queens, and inaugurated express service on the Queens Boulevard Line east of Continental Avenue. F trains ran on the express tracks between West Fourth Street and Broadway-Lafayette Street to avoid conflict with the D and E south of West Fourth Street. This service pattern was first announced by the New York City Board of Transportation on December 1, 1939. With the start of F service, E service was cut back from Church Avenue to Broadway–Lafayette Street. On January 10, 1944, trains were extended to 169th Street during evenings, late nights, and Sunday mornings. Temporarily in 1948, as shown in a map from that year,