M (New York City Subway service)
The M Sixth Avenue Local is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored  since it uses the IND Sixth Avenue Line in Manhattan. The M operates at all times. On weekdays from 6:00 a.m to 9:00 p.m., the M operates between 57th Street in Midtown Manhattan and Metropolitan Avenue in Middle Village, Queens, making local stops along its entire route; weekend daytime and late evening weekday service is cut back to Essex Street in the Lower East Side of Manhattan; late night service short turns at Myrtle Avenue in Brooklyn. Typically, the M's northern terminus is the Forest Hills–71st Avenue station in Queens, though service to that station is suspended from August 2023 until early 2024 due to track replacements. Under its normal service pattern, the M is the only service that travels through the same borough via two different, unconnected lines. Additionally, the M is the only non-shuttle service that has both of its full-run terminals in the same borough (Queens). Though the full route length between 71st Avenue and Metropolitan Avenue is about , the stations are geographically located  apart, marking this as the shortest geographic distance between termini for any New York City Subway service that is not a shuttle service. An MJ service ran the entire BMT Myrtle Avenue Line until 1969, when the section west of Broadway in Brooklyn was demolished. Before 2010, the full-length M ran from Middle Village to southern Brooklyn via the BMT Nassau Street Line and Montague Street Tunnel. The M had originally run on the BMT Brighton Line to Coney Island–Stillwell Avenue until 1987. Afterward, it used the BMT Fourth Avenue Line, and BMT West End Line in Brooklyn, terminating at Ninth Avenue or Bay Parkway. From July 2017 to April 2018, the full-length M terminated at Broadway Junction in Brooklyn; a limited number of M trains operated between 71st Avenue in Queens and Second Avenue in Manhattan. As part of the 14th Street Tunnel shutdown, between April 2019 and April 2020, M service was routed up the Second Avenue Subway to 96th Street during weekday late evenings and weekends, as an alternative for  train service. History

M service

1914–1960

Until 1914, the only service on the Myrtle Avenue Line east of Grand Avenue was a local service between Park Row (via the Brooklyn Bridge) and Middle Village (numbered 11 in 1924). The Myrtle Viaduct, a two-track ramp connecting the Myrtle Avenue Line with the BMT Broadway Elevated (now the Jamaica) Line at the Myrtle Avenue station was opened on July 29, 1914, allowing for a second service, the daytime Myrtle Avenue–Chambers Street Line, or Myrtle-Chambers Line, which ran along the Broadway elevated and the Williamsburg Bridge to Chambers Street on the Nassau Street Loop in Lower Manhattan. Following the completion of a third track along the Broadway Elevated between Marcy Avenue and Myrtle Avenue on January 17, 1916, these trains began running express on the Broadway Elevated during the evening rush hour in the peak-direction. By 1920, trains later began running express in the morning rush hour and on Saturday afternoon in the peak direction. The number 10 was assigned to the service in 1924. At the time, service ran on weekdays between 6 a.m. and 8 p.m., on Saturdays from 6 a.m. and 9 p.m., and on Sundays from 12:30 to 11 p.m. In the morning rush hour, trains ran express between Central Avenue and Essex Street, and during the evening rush hour, trains ran express between Bowery and Broadway–Myrtle Avenue. Sunday service was removed in June 1933. All Saturday trains began running local on June 28, 1952. On February 10, 1958, the four rush hour Brighton-Nassau special trains began stopping at Neck Road and Avenue U. In addition, the evening rush hour trains began stopping at DeKalb Avenue, as had been done by morning rush hour trains. On June 28, 1958, Saturday service was discontinued. On May 26, 1959, midday service was eliminated, making the Myrtle-Chambers Line rush-hours only. Service had previously operated on weekdays from 6 a.m. to 8 p.m. Beginning on February 23, 1960, express trains began stopping at Marcy Avenue, which was originally a local stop. 1961–1978 

In 1961, with the arrival of new subway cars which featured rollsigns with new lettered designations for the BMT's numbered services, the 10 was renamed the M. Since these cars were not assigned to the route, it remained signed as 10. However, the rush hour Nassau Street specials on the BMT Brighton Line and BMT Fourth Avenue Line were signed using the M designation. The line was officially designated "M" after the Chrystie Street changeover on November 27, 1967. The second half of the Chrystie Street Connection opened on July 1, 1968, and the , which had run along Nassau Street to Broad Street, was relocated through the new connection to the IND Sixth Avenue Line (and renamed the KK). To augment  service to Broad Street, the M was extended two stations, from Chambers Street to Broad Street. On October 4, 1969, the Myrtle Avenue Elevated was discontinued south of Myrtle Avenue to Jay Street. To make up for the loss of MJ service, M service was expanded to run during middays, operating weekdays between 6 a.m. and 7 p.m., and a new SS shuttle began running between Myrtle Avenue and Metropolitan Avenue at other times. In August 1972, the off-hour SS shuttle was renamed as part of the M.

Effective January 2, 1973, the daytime QJ was truncated to Broad Street as the , and the M was extended beyond Broad Street during the day along the 's former route to Coney Island–Stillwell Avenue, via the Montague Street Tunnel and Brighton Line local tracks. With the extension of the M onto the Brighton Line, there were also changes to D service. Northbound weekday M train service originating at Kings Highway would begin at 5:46 a.m., while northbound service from Coney Island would begin at 6:34 a.m. From 5:40 to 6:34 a.m. northbound D trains would run local from Brighton Beach to Kings Highway, and then run express to Prospect Park. Late morning and early afternoon D trains would from then on run express from Brighton Beach to Kings Highway. The span of D express service to Brighton Beach was extended by 45 minutes to 9:05 p.m. from Prospect Park, and the span of M service from Broad Street to Coney Island was extended by 45 minutes from the previous span of QJ service to cover local stops. Two M trains began service at Brighton Beach in the morning rush hour, and in the early morning, three M trains entered service at Brighton Beach, and six entered service at Kings Highway. In addition, the final nine southbound M trains of the evening terminated at Brighton Beach. On May 13, 1974, three northbound early morning trains that were placed into service at Brighton Beach were replaced with two trains entering service at Kings Highway and one entering service at Brighton Beach. The local K (renamed from KK in 1973) was eliminated on August 27, 1976, and M express service between Myrtle Avenue and Marcy Avenue ended. On December 3, 1979, four northbound weekday morning rush hour trains that had been put into service at Kings Highway began service at Brighton Beach. 1986–2004 

A six-month 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 in Brooklyn, midday N trains began making local stops in Brooklyn. In addition, the span of M service to Brooklyn was reduced by fifteen minutes in the early morning and in the late evening by 25 minutes. The elimination of midday service to Brooklyn was made permanent on November 12, 1995, after the six-month repair project was completed, as part of a series of service cuts made by New York City Transit to make up a shortfall in its budget. It had been expecting a $160 million surplus in 1995, but due to reductions in state and federal contributions, it was left with a deficit which could reach $172 million. The elimination of midday M service to Brooklyn was part of a larger plan to reduce spending in order to avert a fare increase, which Governor George Pataki and Mayor Rudy Giuliani had pressured the MTA to avoid. Only 4,200 riders used M service to Brooklyn during middays, with fewer than 20 passengers per car, or 80 passengers per train (the M used four-car trains during middays). Because of the low cost effectiveness of operating service to Brooklyn and because of the existence of alternate service on the N and R, it was decided to cut the service. This service cut saved $664,000 annually. Three alternative operating plans were considered: maintaining existing midday service, terminating midday service at Broad Street, and operating service as a shuttle like weekend and late night service. It was decided not to terminate service at Broad Street because it negated a large portion of the crew savings due to the need for personnel to relay trains at the Broad Street terminal, longer running times, and because it had the potential to delay J service, which already terminated there. The shuttle option was dismissed because it would inconvenience a far larger number of M riders. From May 1 to September 1, 1999, the Williamsburg Bridge subway tracks were closed for reconstruction, splitting M service in two sections. One service ran at all times between Middle Village–Metropolitan Avenue and Marcy Avenue. The other ran rush hours only between Bay Parkway and Chambers Street. A shuttle provided service on the BMT Nassau Street Line. Fares on the B39 bus crossing the Williamsburg Bridge were eliminated and free subway-bus transfers were given at Marcy Avenue and at Delancey Street. The closure was anticipated to last until October 1999, but subway service was restored one month ahead of schedule. The project cost $130 million, including replacing the tracks' support structure, signal systems and other equipment. From July 23, 2001, to February 22, 2004, the closure of the north tracks on the Manhattan Bridge resulted in a midday extension back to Ninth Avenue, as well as an extension of the times that the rush hour service was provided to 10 p.m. This change preserved service between the West End Line and Chinatown for passengers that would have taken the  to Grand Street. When full Manhattan Bridge service was restored, midday M service was cut back to Chambers Street and replaced in south Brooklyn by the . Neighborhood leaders in Chinatown were angered by the decision to terminate midday at Ninth Avenue, instead of running it to Bay Parkway. A spokesman for New York City Transit stated that it was easier to terminate trains at Ninth Avenue and that a signal upgrade project was going on further down the line. In addition, the temporary midday service to Brooklyn was lightly used, with an average of 50 to 60 riders per train during middays going to Brooklyn, and fewer than 50 riders per train during evenings going to Brooklyn. The September 11, 2001 attacks caused a temporary reduction of the M to a full-time shuttle until September 17. Then it was extended full-time over the BMT Sea Beach Line to Stillwell Avenue, replacing the , until October 28. 2007–2010 
In December 2007, the MTA announced that it planned to set aside $27 million in 2008 and $60 million annually afterwards for service enhancements to help riders deal with increased fares. Extended weekday evening M service to Broad Street and weekend service to Chambers Street were part of the plan. However, on March 24, 2008, it was announced that because the agency received substantially less revenue from taxes on real estate transactions, the enhancements were reduced to $4.5 million in 2008 and $8.9 million annually afterwards. The plan to extend weekend service to Chambers Street was dropped. After several months' delay, weekday evening trains were extended to Broad Street on July 27, 2008. On November 20, 2008, in light of severe budget woes, the MTA announced a slew of potential service cuts; among them was the potential elimination of rush-hour M service which had extended beyond Chambers Street on the Nassau Street Line in Lower Manhattan to Bay Parkway on the West End Line in Brooklyn. In May 2009, after the New York State Legislature passed legislation to offer financial support to the MTA, the service cut was taken off the table. However, in late 2009, the MTA once again discovered that it was confronting another financial crisis; most of the same service cuts threatened just months earlier were revisited. One proposal included completely phasing out M service and using the  as its replacement. Under this proposal, the V would no longer serve its southern terminus at Second Avenue. Instead, after leaving Broadway–Lafayette Street, it would run along the Chrystie Street–Williamsburg Bridge connection, unused since the elimination of the K in 1976, and stop at the upper (BMT) level of Essex Street in Manhattan before serving all M stations to Metropolitan Avenue in Queens. The MTA determined that this move, while still a service cut, would actually benefit M riders in northern Brooklyn; approximately 17,000 weekday riders used that route to reach its stations in Lower Manhattan, whereas 22,000 transferred to other routes to reach destinations in Midtown Manhattan. However, only about 10,000 riders in Southern Brooklyn used the M to access the Nassau Street Line. This merger opened up new travel options for northern Brooklyn and Queens in that it allowed direct and more convenient access to areas that were not previously served by those routes such as Midtown Manhattan, as before the service changes, M train passengers had to transfer at least once if heading to Midtown. On March 19, 2010, it was reported that the plan had been changed and that the new combined service would instead carry the M train designation, recolored orange to designate the IND Sixth Avenue Line as its Manhattan trunk line, while discontinuing the V train. Many MTA board members opposed the elimination of the M designation, saying that riders would be more comfortable with that rather than a V designation, and because the M had been around longer than the V. The last M trains to Bay Parkway ran on June 25, 2010, and M service via the Chrystie Street Connection began the following Monday, June 28, 2010. 2011–present 
On June 8, 2014, weekend daytime M service was extended to Essex Street as part of an $18 million funding project to improve subway service, as well as to offer a direct connection to the F train on Saturdays and Sundays. Late night service continues to terminate at Myrtle Avenue. During the morning rush hour, the M is at 90 percent of the New York City Subway's capacity guidelines. Ridership on the M has been growing very rapidly since the 2010 service change, and this trend is expected to continue. In June 2016, the frequencies of service on the M route during peak hours were increased, with the expectation that peak train frequencies would be raised again in the future. From July 1, 2017, to April 30, 2018, reconstruction of two sections of the BMT Myrtle Avenue Line—the approaches to the line's junction with the BMT Jamaica Line and Fresh Pond Bridge over the Long Island Rail Road's Montauk Branch in Queens—required a reroute of M service. Trains to and from Manhattan and Queens, instead of diverging at Myrtle Avenue to go to Metropolitan Avenue, continued east on the BMT Jamaica Line and terminated at Broadway Junction at all times except late nights, when service was suspended. A limited amount of rush hour trains ran between 71st Avenue in Queens and Second Avenue in Manhattan, replicating the  train's routing prior to its discontinuation in 2010. Three shuttle bus routes ran during reconstruction of the Fresh Pond Bridge: one between Myrtle Avenue and Fresh Pond Road; the second between Myrtle and Metropolitan Avenues, skipping the Fresh Pond Road station during the daytime hours; and the third between Flushing Avenue/Broadway and Middle Village–Metropolitan Avenue, stopping at Flushing and Wyckoff Avenues for a transfer to the BMT Canarsie Line at Jefferson Street. When the Fresh Pond Bridge project was completed on September 2, 2017, two six-car shuttle trains began operating between Metropolitan and Wyckoff Avenues at all times, running separately from each other on each of the two tracks; two additional six-car trains were stored in the Fresh Pond Yard in order to swap consists in and out of service. These shuttles, along with a shuttle bus route that provided service between Wyckoff Avenue and Broadway, ran until April 27, 2018. When the 14th Street Tunnel shutdown started in April 2019, weekend and weekday evening M service (from 11:00 p.m. to 1:15 a.m.) was extended from Essex Street to 96th Street on the Second Avenue Subway in Manhattan, via 63rd Street, to compensate for limited L service between Brooklyn and Manhattan. The M had to run to 96th Street because of capacity reductions on the Queens Boulevard Line due to ongoing weekend construction. Both weekday and weekend M frequencies were also increased. This extra service was discontinued after completion of tunnel construction on April 27, 2020. Weekday evening service after 9:15 p.m. was also indefinitely cut back from Forest Hills to Essex Street to accommodate maintenance work for the installation of communications-based train control on the Queens Boulevard Line, Eighth Avenue Line, and Sixth Avenue Line. Weekend frequencies on the M route were increased in July 2023. From August 28, 2023, through the first quarter of 2024, weekday M trains will be truncated to 57th Street in Manhattan, and F trains will be rerouted via the 53rd Street Tunnel between Queens and Manhattan, due to track replacement and other repairs in the 63rd Street Tunnel. Weekend M service would continue to terminate at Essex Street. MJ service

On March 5, 1944, 11 trains stopped running over the Brooklyn Bridge, instead ending at Bridge–Jay Streets on the Brooklyn side, and all 11 trains terminated there (with a free transfer to the IND trains at Jay Street–Borough Hall). In 1967, when the Chrystie Street Connection opened, the label MJ was assigned to the 11 service. The western half of the Myrtle Avenue Line closed on October 4, 1969, ending MJ service, which was replaced with a free transfer to the B54 bus. Several days before the scheduled closing date, some supports for the elevated structure were hit by a truck, temporarily suspending service. Timber reinforcement was applied to damaged pillars, allowing service to resume until the scheduled closing date. Route

Service pattern 
The following table shows the lines used by the M, with shaded boxes indicating the route at the specified times:

Stations 
For a more detailed station listing, see the articles on the lines listed above. The M train runs on the following lines:

References

External links 

 MTA NYC Transit – M Sixth Avenue Local
 
 

New York City Subway services