New York City Subway rolling stock



The New York City Subway is a large rapid transit system and has a large fleet of electric multiple unit rolling stock. , the New York City Subway has cars on the roster.

The system maintains two separate fleets of passenger cars: one for the A Division (numbered) routes, the other for the B Division (lettered) routes. All A Division equipment is approximately 8 ft wide and 51 ft long. B Division cars, on the other hand, are about 10 ft wide and either 60 ft or 75 ft long. The A Division and B Division trains operate only in their own division; operating in the other division is not allowed. All rolling stock, in both the A and B Divisions, run on the same 4 foot standard gauge and use the same third-rail geometry and voltage. A typical revenue train consists of 8 to 10 cars, although in practice they can range between 2 and 11 cars.

The subway's rolling stock have operated under various companies: the Interborough Rapid Transit (IRT), Brooklyn–Manhattan Transit (BMT), and Independent Subway System (IND), all of which have since merged into the New York City Transit Authority. Cars purchased by the City of New York since the inception of the IND and for the other divisions beginning in 1948 are identified by the letter "R" followed by a number. Various kinds of cars are also used for maintenance work, including flatcars and vacuum trains.

Total fleet
, the New York City Subway has cars on the roster. The system maintains two separate fleets of passenger cars: one for the A Division routes, the other for the B Division routes. All A Division equipment is approximately 8 ft wide and 51 ft long. B Division cars are larger, about 10 ft wide and either 60 ft or 75 ft long. The 75-foot cars, the R44s, R46s, R68s, and R68As, are not permitted on BMT Eastern Division – the J, L, M, and Z trains – because of sharper curves on those tracks.

All rolling stock, in both the A and B Divisions, run on the same 4 foot standard gauge and use the same third-rail geometry and voltage. However, trains operate only in their own division; operating in the other division is not allowed. A Division sections have narrower tunnel segments, tighter curves, and tighter platform clearances than the B Division sections, so B Division trains cannot fit in the A Division tunnels and stations, while A Division trains would have an unacceptably large gap between the platform and train if they were allowed in service on B Division lines. Also, the safety train stop (trip cock) mechanism is not compatible between divisions, being located on opposite sides of the track and train in each division. However, service and maintenance trains are composed of A Division-sized cars, so they can operate with either division's clearances and have safety train stops installed on both sides of the trucks.

A typical revenue train consists of 8 or 10 cars. The exceptions are the Franklin Avenue Shuttle, which runs 2-car trains; the Rockaway Park Shuttle, which runs 4-car trains; the 42nd Street Shuttle, which runs 6-car trains; the, which runs 5-car trains; and the , which runs 11-car trains.

When the Brooklyn Rapid Transit Company entered into agreements to operate some of the new subway lines, they decided to design a new type of car, 10 ft wide and 67 ft long. The subject of several patents, the car's larger profile was similar to that of steam railroad coaches, permitting greater passenger capacity, more comfortable seating, and other advantages. The BRT unveiled its design, designated BMT Standard, to the public in 1913 and received such wide acceptance that all future subway lines, whether built for the BRT, the IRT, or eventually the IND, were built to handle the wider cars.

When the R44s and R46s were rebuilt, the rollsigns on the side of the cars were replaced with electronic LCD signs while the front service sign remained as a rollsign. In sharp contrast, the rebuilt R32s and R38s retained rollsigns on the sides, but a flip-dot display was placed in the front. The MTA has been incorporating newer subway cars into its stock in the past two decades. Since 1999, the R142s, R142As, R143s, R160s, R179s, R188s, and R211s have been added into service. All cars built since 1992 (including the now out-of-service R110As and R110Bs) are equipped with digital signs on the front, sides, and interior (except for the R110Bs, which had rollsigns on the front).

Old cars, some from the original companies (IRT, BMT, and IND), are preserved at the New York Transit Museum, while others have been sold to private individuals and/or other railway/trolley museums. Private companies include Railway Preservation Corp., whose equipment is often used on New York Transit Museum-sponsored excursions.

Between 1984 and 1989, some of the IRT trains were painted red, giving them the name Redbirds. By January 2022, various older B Division cars, such as the entire fleets of R32s, R38s, R40s, R40As, R42s, and NYCT R44s, were similarly retired and replaced by newer models, including the R160s and R179s.

General Overhaul Program
The General Overhaul Program (GOH) was a mid-life overhaul program for neglected subway cars, which involved a thorough rebuilding of the fleet. Since the completion of the GOH program, the new Scheduled Maintenance System (SMS) program has replaced the GOH program by ensuring that trains do not reach a state in which they would need such an overhaul. The car types, which were part of the MTA NYCT GOH program, are the IRT Redbirds (R26, R28, R29, R33, R33S, R36), as well as IND/BMT cars (R30 GE, R32, R38, R40, R40A, R42, R44, and R46). These cars were rebuilt between 1985 and 1993. Some cars in various classes from R10 to R46 were also given lighter overhauls during this period.

"R"-prefixed orders
Cars purchased by the City of New York since the inception of the IND and for the other divisions beginning in 1948 are identified by the letter "R" followed by a number, e.g., R46. This number is the contract number under which the cars were purchased. Cars with nearby contract numbers (e.g., R1 through R9, or R21 through R36, or R143 through R179) may be virtually identical, simply being purchased under different contracts.

The New York City Board of Transportation settled on a system of documentation that is still in place under MTA New York City Transit. This included a prefix letter or letters that indicated the department that the specific documentation, followed by a series of numbers of a length defined by the specific department concerned. For example, the Surface Department used the letter "S", while the Rapid Transit Department used the letter "R". A new R- number is assigned for any vehicle purchase involving a bidding process. Since the 1970s, the system has suffered from "R- inflation" going through only 46 R- numbers in its first 40 years, but over 114 in its subsequent 30. Possible reasons include an increased number of specialized maintenance vehicles that were previously made in house or a lower floor for requiring a formal bidding process to reduce waste and abuse.

Disposal at sea
In 2001, the New York City Transit Authority started disposing of retired subway cars by dumping them at sea to create artificial reefs, with the intention of promoting marine life. This option was chosen because it was less expensive than removing asbestos from the cars; the asbestos was determined to not be a hazard in the ocean.

The artificial reefs would provide environmental and economic benefits, such as providing shelter for marine animals and creating new fishing opportunities. The first reef constructed was Redbird Reef in Delaware. Eventually, multiple states received retired subway cars for reefs. The program was discontinued in 2010, after more than 2,500 cars were reefed, because newer cars contained more plastic, which was too expensive to economically remove before reefing.

Maintenance vehicles
Various kinds of cars are used for maintenance work, including flatcars and vacuum trains.

Track geometry car
There are four track geometry cars on the New York City Subway that measure the system's track geometry to ensure that safe train operation is maintained. The cars are numbered TGC1–TGC4. TGC1 was ordered under contract R59 in 1984 for $1.4 million, TGC2 was ordered under contract R63 and cost $2.5 million,. Contract R-34152 purchasing TGC3 was awarded on December 29, 2004, for $9,610,963, and after additional funding was later authorized by the Board, Modification 1 exercising the Option for TGC4 was awarded on January 18, 2006, for $9,622,858. Subsequent modifications added newer equipment, such as a more advanced laser scanner, to TGC4 prior to its delivery to NYCTA. The cars use sensors, measuring systems, and data management systems to get a profile of the tracks. The train crew consists of two-track equipment maintainers, one maintenance supervisor, and two to three engineers. The trains typically operate during off-peak weekday daytime hours so as to not interfere with more frequent rush hour service. A single car weighs 45 tons. The cars measure:
 * Alignment – "Alignment is the projection of the track geometry of each rail or the track center line onto the horizontal plane," (FRA Definition). Also known as the "straightness" of the tracks.
 * Crosslevel – The variation in the cant of the track over the length of a predetermined "chord" length (generally 62 ft). On straight or tangent track, ideally, there should be no variation, while on curves, a cant is generally desired.
 * Curvature – The amount by which the rail deviates from being straight or tangent. The geometry car checks the actual curvature (in Degree of curvature) of a curve versus its design curvature.
 * Rail gauge – The distance between the rails. Over time, rail may become too wide or too narrow. In North America and most of the world, standard gauge is 4 ft 8½ in (1,435 mm).
 * Rail profile – Looks for rail wear and deviations from standard profile.
 * Warp – The maximum change in crosslevel over a predetermined chord length (generally sixty-two feet).
 * Corrugation of running rail surface
 * Tunnel and station platform clearances
 * Third rail height and gauge
 * Vertical gap between third rail and protective board

The track geometry car typically checks each stretch of track about 6 times a year; the car is manually operated, and there are no plans to automate inspection of the track geometry, which is done manually with the help of high-tech equipment aboard the car.

Miscellaneous



 * Air conditioning is standard on all cars R42 and later. R38s 4140–4149 and R40s 4350–4549 were also delivered with A/C, and all cars not equipped with A/C from classes R26–R40 (with the exception of the R27, R30, and R33S) were later retrofitted with A/C. All active cars are equipped with air conditioning, and cars with malfunctioning air conditioning are not supposed to be put into service.
 * During World War II, a group of late-19th-century New York elevated cars was sent west to the San Francisco Bay Area by the United States Maritime Commission for use by the Shipyard Railway, a temporary wartime electric line transporting workers to the Kaiser Shipyards. After the war, most were sold to be used as units in a local motel, but their whereabouts afterward is unknown. Two of them, however, were acquired and have been restored by the Western Railway Museum in Rio Vista, California.
 * There are many examples of rolling stock built under contract that are not intended for revenue services, such as the R95 money train, R65 pump train, R127/R134 garbage train, and R156 work locomotive.
 * After the September 11th attacks, an American flag decal was added to every active subway car in the system. This practice continued with new car orders through the early 2020s.
 * The table below shows what year the TA had expected to retire several car models in 1981.