began went into service at 86th Street during the AM rush hour put-ins. Between November 23, 1987 and May 13, 1988, one D train arrived at Ditmars Boulevard at 7:12 a.m. and returned in service as an N train. When the north side of the Manhattan Bridge reopened and the south side was closed on December 11, 1988, the N began running local in Manhattan and via the Montague Tunnel at all times. In order to replace B service to Ditmars Boulevard, additional N service was provided during rush hours. Trains continued to run express in Brooklyn between Pacific Street and 59th Street/Fourth Avenue evenings and weekends. On June 11, 1990, trains that were put into service at Queensboro Plaza in the PM rush hour were discontinued. Between June 10, 1990 and July 25, 1992, due to construction work in the 60th Street Tunnel, trains had to use a single track. Trains operated either between Ditmars Boulevard and Canal Street, or between 57th Street and Coney Island. The Transit Authority and politicians pressured the New York State Department of Transportation to resume N train service on the bridge's south side on September 30, 1990, despite warnings from engineers that the structure was unsafe and major repairs still had to be made. Trains ran express on Broadway in Manhattan (stopping at 49th Street) and Fourth Avenue in Brooklyn at all times except late nights (10 p.m. to 5 a.m.). Southbound Brooklyn expresses ran until late evenings on Saturday, not running on Sunday morning any more. Between early morning and early evenings, trains skipped DeKalb Avenue. Several trains after the AM rush hour went out of service at Kings Highway. On December 27, state inspectors forced N service to be rerouted via the Montague Street Tunnel again after discovery of corroded support beams and missing steel plates, running local on its entire route at all times. 1990–2000 In November 1993, before the Manhattan Bridge's renovation was completed, the MTA proposed restoring express N service along the Fourth Avenue Line for a six-month trial period, with the M making local stops between Pacific Street and 36th Street. Some residents of Sunset Park, Brooklyn, opposed the proposal, which they claimed would negatively impact about 7,000 daily riders at the 45th Street and 53rd Street stations. On May 31, 1994, the N began running express in Brooklyn between Pacific Street and 59th Street–Fourth Avenue during