D (New York City Subway service)

Sixth Avenue Express
A train made of R68 cars in D service at Bay Parkway, bound for Manhattan and the Bronx.
Northern end	Norwood – 205th Street
Southern end	Coney Island – Stillwell Avenue
Stations	41
Rolling stock	232 R68s (29 trains, AM rush) 216 R68s (27 trains, AM rush)
Depot	Concourse Yard
Started service	December 15, 1940; 76 years ago (1940-12-15)

The D Sixth Avenue Express 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. The D operates at all times between 205th Street in Norwood, Bronx, and Stillwell Avenue in Coney Island, Brooklyn via Grand Concourse in the Bronx, Central Park West / Sixth Avenue in Manhattan, the north side of the Manhattan Bridge, and Fourth Avenue / West End in Brooklyn. The D runs express in Manhattan and makes all stops on the BMT West End Line in Brooklyn at all times. The D also makes all stops in the Bronx except when it runs express in the peak direction during rush hours. The D runs express on Fourth Avenue at all times except nights when it serves all stops.

D service began on December 15, 1940 when the IND Sixth Avenue Line opened. It ran from 205th Street, the Bronx to World Trade Center (at that time called Hudson Terminal) on the IND Eighth Avenue Line, switching between the IND Sixth Avenue to the Eighth Avenue Lines just south of West Fourth Street – Washington Square.

D service was increased on October 24, 1949 in order to offset the loss off CC service.