The line crossed the BMT Myrtle Avenue Lineat grade two blocks south of its merge with the Brooklyn elevated. On its second day of operation, November 6, a Hudson Avenue train crashed into a Myrtle Avenue train.[4] Service was suspended immediately,[5] and did not resume until June 22, 1889, when an extension south to Third Street was completed, and a new connection into Myrtle Avenue opened, taking trains between Third Street and Sands Street at the end of the Myrtle Avenue Line, and replacing the four track crossings with one.[6] The unused two blocks north of Myrtle Avenue were placed back in service on December 9, 1889, when Myrtle Avenue trains began to use it to reach Fulton Ferry via the old Brooklyn elevated.[7]
The Seaside and Brooklyn Bridge Elevated Railroad was organized on March 18, 1890[11] to extend the Fifth Avenue Elevated south to Fort Hamilton, to extend the Lexington Avenue Elevated from Van Siclen Avenue east to the city line,[12] and to build in High Street at the Brooklyn Bridge (this became part of the Sands Street station loop).[13] The extension of the Fifth Avenue Elevated, along Fifth Avenue, 38th Street, and Third Avenue, opened to 65th Street on October 1, 1893.[14][15]
On June 25, 1923, two cars of a northbound train derailed and fell towards Flatbush Avenue. Eight passengers died and many were injured.[16][17] At midnight on June 1, 1940, service on the Fifth Avenue Elevated ended as required by the unification of the city's three subway companies.[18][19]
On September 15, 1941, the demolition of the Fifth Avenue Elevated started at 35th Street and Fifth Avenue, and it was completed by November of that year.[20] The section of the elevated on Third Avenue from 38th Street to 65th Street was used as part of the elevated highway approach, the Gowanus Expressway, to the Brooklyn–Battery Tunnel. In total, three miles of the elevated were scrapped, with the work being done by the Harris Structural Steel Company.[2]
Note that this is a list of New York City Subway lines, which are the physical infrastructure over which services operate. Lines with colors next to them are trunk lines; trunk lines determine the color of New York City Subway service bullets, except for shuttles, which are dark gray.