HH (Court Street Shuttle)

HH was the last of the letters assigned to original routes of the Independent Subway System of the New York City Subway in the 1930s. It was designated as the dedicated service letter of the IND Fulton Street Line in Brooklyn.

The letter was intended to be used for a Fulton Street local, to run from Court Street, a stub-end station in downtown Brooklyn, to the future Euclid Avenue station near the border with Queens. The service, to be designated HH (the double letter denoting a local train) was to provide local service on the Fulton Street Line, with express service on the 4-track line provided by express trains through routed from Manhattan.

When service on the Fulton Street Line began on April 9, 1936, the Manhattan trains provided the local service instead, and the HH ran only as a one-stop shuttle to connect Court Street with Hoyt–Schermerhorn Streets, where connections with other lines could be made. Service between these two stations, which were only three blocks apart in distance, was discontinued on June 1, 1946.

The Court Street station is now the site of the New York Transit Museum. The tracks leading to the station are still operable and are used to move trains to and from the exhibit.