Line and BMT Culver Line opened. D service was rerouted via these two lines to Coney Island–Stillwell Avenue with alternate trains running to Church Avenue during rush hours. On Saturdays, four round trips ran between 205th Street and Kings Highway. D trains replaced F service on the South Brooklyn Line, and were sent over the new connection as the first IND service to reach Coney Island. The service was announced as Concourse–Culver and advertised as direct Bronx–Coney Island service. On May 13, 1957, alternate D trains were cut back to Church Avenue during weekday middays. Between October 7, 1957, and 1959, four rush hour trains ran to Euclid Avenue via the IND Fulton Street Line when the D started being inspected at Pitkin Yard. Four trains left 205th Street between 7:20 and 8:10 a.m., and one left Bedford Park Boulevard at 8:53 a.m. These four trains returned between 3 and 5 p.m. During the morning rush hour, several northbound trains ended at Bedford Park Boulevard. These trains ran express along the Fulton Street Line if they ran during the hour that A trains ran express during the line. From December 4 to 27, 1962, a special service labeled DD was provided due to a water main break. It ran local from 205th Street, Bronx to 59th Street–Columbus Circle, then continued as a local down the Eighth Avenue Line to West Fourth Street, where it switched to the Sixth Avenue Line and continued on its normal route to Coney Island–Stillwell Avenue via the Culver Line. Chrystie Street On November 26, 1967, the Chrystie Street Connection opened, connecting the Sixth Avenue Line with the north tracks of the Manhattan Bridge and the BMT Southern Division lines in Brooklyn. In conjunction with this project, the new express tracks on the Sixth Avenue Line between West Fourth Street–Washington Square and 34th Street were opened, providing additional capacity for the extra trains on the IND via the connection. On this date, D service was switched over to BMT Brighton Line via this new connector, running express on weekdays to Brighton Beach and local to Stillwell Avenue at all other times. The D replaced Q service, which had run local in Brooklyn (except during morning rush hours and early evenings) and express on the BMT Broadway Line in Manhattan, terminating at 57th Street. In Manhattan, it ran express from West 4th Street to 34th Street rush