B43 (New York City bus)

The Brooklyn City Railroad opened the line, as the Flushing Avenue Line, in July 1854 as a branch of the Fulton Street Line continuing east along Flushing Avenue to Throop Avenue with an extension to Division Avenue (present-day Broadway) in April 1855.[2] It was later extended north along Graham Avenue to North Second Street (present-day Metropolitan Avenue) in 1867[3][4] and to Van Cott Avenue (present-day Driggs Avenue) in October 1872.[5]

On April 27, 1890, Brooklyn City opened new trackage on Flushing Avenue from Graham Avenue east to Metropolitan Avenue, with the service operating on it becoming the new Flushing Avenue Line,[6] and the old Flushing Avenue Line being renamed the Flushing and Graham Avenues Line and afterwards, the Graham Avenue Line. The Graham Avenue Line was later extended north along existing trackage on Driggs Avenue and Manhattan Avenue to Hunters Point.

Buses on the Graham Avenue Line were substituted for streetcars on December 21, 1948, and the route was renumbered the B62.

On September 10, 1995, the B62 was merged with the B47 to form the present-day B43 route.[7][8] The B47 had replaced the Tompkins Avenue Line running between Prospect-Lefferts Gardens and Williamsburg along Empire Boulevard, Kingston Avenue, Tompkins Avenue, and Harrison Avenue. When the routes were combined, the Harrison Avenue portion of the B47 was removed, along with the Flushing Avenue section of the B62.