Street, Bronx and Utica Avenue, Brooklyn, making local stops on the IND Fulton Street Line. AA service was reinstated during this time, but only during off-peak hours (non-rush hours, late Saturday afternoons and Sundays) when the BB and CC did not operate. The CC would provide Eighth Avenue Line local service during rush hours, with the AA replacing it during off-peak hours, mostly unchanged until 1988. In the 1940s, C trains ran every 10 minutes during rush hour, CC trains ran every 4 minutes, and D trains ran every 5 minutes. On October 24, 1949, C express service was discontinued. Additional D service was added to offset this loss. The CC, which only ran during rush hours, began terminating at Broadway–Lafayette Street Mondays to Fridays, and on Saturdays CC service continued to operate to Hudson Terminal. On December 29, 1951, Saturday CC service was discontinued. Weekday CC service returned to its previous terminal at Hudson Terminal on October 30, 1954. On August 30, 1976, the CC train replaced the train as the rush-hour local along the IND Fulton Street Line and IND Rockaway Line, running from Rockaway Park–Beach 116th Street in Queens through Brooklyn and Manhattan to Bedford Park Boulevard in the Bronx, making it the only service to run through all four boroughs served by the subway. The Rockaway Park Shuttle HH was renamed CC. This shuttle ran between Broad Channel and Rockaway Park during off-peak hours, except late nights. With this, all daytime service to and from Rockaway Park was named CC. Late nights, the shuttle ran between Euclid Avenue, Rockaway Park and Far Rockaway–Mott Avenue via Hammels Wye, and was labeled A. On August 28, 1977, late night AA service was eliminated. The A began making local stops in Manhattan during late nights, when the AA was not running. On May 6, 1985, the IND practice of using double letters to indicate local service was discontinued. The AA was renamed the K and rush hour CC service was renamed C. The off-peak Rockaway Park Shuttle was renamed . This change was not officially reflected in schedules until May 24, 1987. Modern service consolidations On December 10, 1988, the K designation was discontinued and merged into the C, which now ran at all times except late nights. The C ran from Bedford Park Boulevard to Rockaway Park during rush hours, 145th Street to Euclid Avenue during middays, and