1965, two morning F trains began running to Chambers Street. Beginning on July 11, 1966, trains no longer ran express between Parsons Boulevard and 71st–Continental Avenues weekday middays, and were extended weekdays daytime from Broadway-Lafayette Street back to Second Avenue. On August 30, 1966, service was cut back to Broadway-Lafayette Street. With the opening of the Chrystie Street Connection on November 26, 1967, service was rerouted via this connection, the north side of the Manhattan Bridge, and the BMT Brighton Line in Brooklyn. F service replaced it on the IND Culver Line, with trips running to Coney Island at all times, with supplemental trips to Church Avenue during rush hours. Beginning on August 19, 1968, rush hour express service was added, in both directions, between Jay Street-Borough Hall and Church Avenue, and in rush hours, peak direction trains to and from Stillwell Avenue (alternating with those terminating at Kings Highway) ran express as well between Church Avenue and Kings Highway. Beginning on June 16, 1969 express service was modified, with Kings Highway trains operating as locals along the entire route from Jay Street to Kings Highway. On January 2, 1973, Kings Highway F trains began running express once again between Church Avenue and Jay Street in both directions. In addition, F trains began running express between 179th Street and Continental Avenue weekdays between 7:30 a.m. and 7:30 p.m. toward Queens, and between 6:00 a.m. and 6:15 p.m. toward Manhattan. In addition, between 10:00 a.m. and 2:20 p.m. Manhattan-bound, and between 10:00 a.m. and 3:00 p.m. Queens-bound, F trains would stop at 169th Street. On January 18, 1976, F express service between Jay Street and Church Avenue was discontinued during rush hours in the peak direction, and only Coney Island trains in the reverse-peak direction ran express between Jay Street and Church Avenue. Peak direction GG trains were cut back to Smith–Ninth Streets. On August 30, 1976, express service between Bergen Street and Church Avenue was completely discontinued, with all trains making all stops. Rush direction alternate-train express service between Ditmas Avenue and Kings Highway was retained. In addition, several northbound trips in the morning rush hour began being put into service at Avenue X. GG trains began terminating at Smith–9th Streets at all times. The elimination of express service was made as part of service changes which eliminated 215 runs that were deemed underutilized to reduce operating deficits. The changes,