BU cars (New York City Subway car)

Various orders of these cars were built by the Osgood-Bradley, Brill, Cincinnati, Laconia, Pullman, Gilbert & Bush, Harlan & Hollingsworth, Wason, Pressed Steel, Brooklyn Heights Railroad, John Stephenson, and Jewett car companies.

The term BU was derived from the Brooklyn Union Elevated Railroad (BUERR) Company, one of the last operating companies of Brooklyn elevated lines before the BRT formed the New York Consolidated Railroad in 1912 to absorb the BUERR and other properties.

A trainman between each pair of cars manually opened and closed folding gates to admit or bar passengers from entering or leaving.

However, the cars retain their 1957 lowered roofs and 1950 lightweight trucks, as well as modified marker light positions on the ends.

As part of the June 22, 1965 "Transit Day" commemoration at the World's Fair, Q-type 1622A-B-C were rehabilitated and repainted in the original colors used for the 1939–40 World's Fair, blue and orange,[3] which are also the colors of the New York City flag.