reconstruction project on the Brighton Line began on April 26, 1986, and to reduce congestion and delays, weekday daytime M service was shifted to the Fourth Avenue Line's express tracks south of DeKalb Avenue and the BMT West End Line. Service began terminating at Ninth Avenue during middays, and at Bay Parkway during rush hours. This service duplicated a pattern that had last been operated as the until late 1967. Manhattan-bound M trains operated from Bay Parkway between about 7:00 and 8:20 a.m., operating every 12 to 15 minutes. Bay Parkway-bound M trains left Chambers Street between 4:20 and 5:30 p.m. In 1991, M trains began running with fewer cars at all times except weekdays from 6 a.m. to 8 p.m. in order to increase passenger security during overnight hours. M service along Fourth Avenue, operating between 6:30 a.m. and 8:00 p.m., was switched to the local tracks on May 31, 1994, switching with the , which had run local since the M was moved in 1987. The change was implemented on a six-month trial, and was made permanent afterwards. This change was made as part of New York City Transit's Fare Deal, which sought to increase transit ridership by improving service. The change was proposed in November 1993, and public hearings on the change were held. The change reduced travel times by minutes for 26,000 people, a majority of the riders on the corridor. As a result of the change, some riders shifted from using stations on the BMT West End Line to the BMT Sea Beach Line, and from Fourth Avenue local stops to Fourth Avenue express stops. Market research found that 44% of M riders felt that crowding decreased, that 35% of M and 30% of N riders used their service more frequently, that 58% of riders thought the change was a good idea, and that only riders at the 45th Street and 53rd Street stations, which received less frequent service, viewed the changes negatively. This change increased operating costs by $245,000. The midday M (between 9:30 a.m. and 3:30 p.m.) was temporarily truncated to Chambers Street on April 30, 1995 from Ninth Avenue in Brooklyn due to the closure of the Manhattan Bridge during weekday middays for structural repairs. The change was made to provide capacity in the Montague Street Tunnel for the Q, which was rerouted from the Manhattan Bridge. To replace M local service