hour R service between Chambers Street and 95th Street-4th Avenue in Brooklyn. The KK (since renamed the K) was discontinued in 1976 as a money-saving measure, ending service via the Williamsburg Bridge connection. Reconstruction of the Manhattan Bridge occurred from 1986 to 1988, in 1995, and from 2001 to 2004. At times, this made the Chrystie Street Connection unavailable for through trains, and made the Grand Street station a terminal for Grand Street Shuttle service to Broadway–Lafayette Street. The Manhattan Bridge reopened fully in 2004. Current service routing The Chrystie Street Connection returned to full revenue service on June 28, 2010. The Manhattan Bridge connection continues to be used by the B and D services. The Williamsburg Bridge connection is now used by the M service, which had formerly come into Manhattan on the BMT Nassau Street Line. In June 2010, as part of a round of service cuts, the was rerouted via Chrystie Street onto the IND Sixth Avenue Line, continuing along the V service's former routing north of Broadway–Lafayette Street. At the same time, the V route had been eliminated. Proposed Second Avenue Subway connections As a road, Chrystie Street extends northward beyond Houston Street to become Manhattan's Second Avenue, and the Chrystie Street Connection was the first part of the long-planned Second Avenue Subway to be opened to service. The connection is one of several vestiges of early efforts to build the Second Avenue Subway, and before the connection was built, the original IND construction for the line included a recession in the ceiling at Second Avenue station and a short tunnel under Bowery. The Chrystie Street Connection comprises two of the six parts of the Second Avenue Subway that were built in the 1960s and 1970s—the other four parts being the BMT 63rd Street Line, two unused subway segments under Second Avenue in East Harlem (one of which was connected to the 63rd Street line for Phase 1 of the Second Avenue line, which opened in 2017), and an unused subway segment under Confucius Plaza just to the south. The Chrystie Street Connection would have facilitated cross-platform and track interchanges between the Second and Sixth Avenue lines at Grand Street. Under current plans, Phase 4 of the future Second Avenue Subway will be built below the existing Sixth Avenue tracks. Station listing References External links NYCsubway.org - Historical Maps Rapid Transit Service Changes, TA brochure, 1968