A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines. A DMU requires no separate locomotive, as the engines are incorporated into one or more of the carriages. Diesel-powered single-unit railcars are also generally classed as DMUs. Diesel-powered units may be further classified by their transmission type: diesel–mechanical DMMU, diesel–hydraulic DHMU, or diesel–electric DEMU.
A bilevel car or double-decker coach is a type of rail car that has two levels of passenger accommodation as opposed to one, increasing passenger capacity.
Tri-Rail is a commuter rail service linking Miami, Fort Lauderdale and West Palm Beach in Florida, United States. The Tri prefix in the name refers to the three counties served by the railroad: Palm Beach, Broward, and Miami-Dade. Tri-Rail is managed by the South Florida Regional Transportation Authority (SFRTA) along CSX Transportation's former Miami Subdivision; the line is now wholly owned by the Florida DOT. The 80.0-mile-long (128.7 km) system has 19 stations along the Southeast Florida coast, and connects directly to Amtrak at numerous stations, to Metrorail at the Metrorail Transfer station, Miami Airport station, and MiamiCentral, and to Brightline at MiamiCentral.
The British Rail Class 116 diesel multiple units were built by BR Derby from 1957 to 1961. Introduced as part of the British Railways Modernisation Plan in the mid 1950s, as with other first generation DMUs the 116 was intended to replace steam trains and reduce costs across the rail network. Alongside Metro-Cammell, BR Derby had prior experience with DMUs, having developed a Lightweight Unit, and so was awarded a contract for a new design.
The British Rail Class 104 diesel multiple units were built by Birmingham Railway Carriage and Wagon Company from 1957 to 1959.
The British Rail Classes 101 and 102 diesel-mechanical multiple units were built by Metro-Cammell at Washwood Heath in Birmingham, England from 1956 to 1959, following construction of a series of prototype units. These classes proved to be some of the most successful and longest-lived of BR's First Generation DMUs, second in longevity only to the Class 121, with the final five units being withdrawn on 24 December 2003. The oldest set was, by then, just over 47 years old.
The British Rail Class 127 diesel multiple units were built by BR Derby in 1959. Thirty 4-car units were built, formed of two outer driving motor vehicles, sandwiching two intermediate trailers which were classified class 186. The technical description of such as 4-car unit was DMBS + TSL + TS + DMBS.
The Budd Rail Diesel Car (RDC), also known as the Budd car or Buddliner, is a self-propelled diesel multiple unit (DMU) railcar. Between 1949 and 1962, 398 RDCs were built by the Budd Company of Philadelphia, Pennsylvania, United States. The cars were primarily adopted for passenger service in rural areas with low traffic density or in short-haul commuter service, and were less expensive to operate in this context than a traditional diesel locomotive-drawn train with coaches. The cars could be used singly or coupled together in train sets and controlled from the cab of the front unit. The RDC was one of the few DMU trains to achieve commercial success in North America. RDC trains were an early example of self-contained diesel multiple unit trains, an arrangement now in common use by railways all over the world.
The Indiana Railway Museum is a railroad museum located in French Lick, Indiana, United States, dedicated to preserving and displaying artifacts related to the history of railroads in Indiana.
Push–pull is a configuration for locomotive-hauled trains, allowing them to be driven from either end of the train, whether having a locomotive at each end or not.
The Westside Express Service (WES) is a commuter rail line in the U.S. state of Oregon serving parts of Washington and Clackamas counties in the Portland metropolitan area. Owned by TriMet and operated by Portland & Western Railroad (P&W), the line is 14.7 miles (23.7 km) long and travels north–south from Beaverton to Wilsonville along a route just west of Oregon Highway 217 and Interstate 5 (I-5). WES consists of five stations and connects with MAX Light Rail at Beaverton Transit Center. Service operates on a 45-minute headway on weekdays during the morning and evening rush hours. In Spring 2022, WES saw a daily ridership of 420 passengers or about 109,000 riders annually.
The Comet railcar is a class of locomotive-hauled railcars that was first designed in the late 1960s by Pullman-Standard as a modern commuter car for North American rail lines. Later, the Comet moniker was adopted by NJ Transit for all of its non-powered single level commuter coaches. Additional series of cars bearing the Comet name, based on the original design, have since been built by Bombardier Transportation and Alstom. The successful design was adopted by numerous commuter agencies.
Colorado Railcar was a manufacturer of railroad rolling stock—railcars and diesel multiple unit commuter vehicles. Both products came in single- and double-level versions. It shut down in 2008, with its assets being purchased by US Railcar.
A control car, cab car, control trailer, or driving trailer is a non-powered rail vehicle from which a train can be operated. As dedicated vehicles or regular passenger cars, they have one or two driver compartments with all the controls and gauges required to remotely operate the locomotive, including exterior locomotive equipment such as horns, bells, ploughs, and lights. They also have communications and safety systems such as GSM-R or European Train Control System (ETCS). Control cars enable push-pull operation when located on the end of a train opposite its locomotive by allowing the train to reverse direction at a terminus without moving the locomotive or turning the train around.
The Sprinter is a family of diesel multiple unit trains in use on the British railway system. They were built in the 1980s and early-1990s by British Rail Engineering Limited (BREL), Metro-Cammell and Leyland. Sprinters operate in almost every part of Great Britain, from rural branch lines to commuter expresses into major cities.
The 22000 Class "InterCity Railcar" is a diesel multiple unit in service with Iarnród Éireann in Ireland.
The C3 is a bi-level coach railroad car built by Kawasaki. Ordered by the Metropolitan Transportation Authority for use on the Long Island Rail Road (LIRR), the cars began to enter revenue service in 1997. The rail cars are pulled and pushed by EMD DE30AC and DM30AC dual-mode locomotives. The C3 cars are powered by 480 V AC head-end power supplied from the locomotive.
Diesel multiple units and railcars are trains, usually with passenger accommodation, that do not require a locomotive. Railcars can be single cars, while in multiple units cars are marshalled together with a driving position either end. As of December 2010, 23 percent of the rail passenger cars used on Network Rail are part of a diesel multiple unit.
The Nippon Sharyo DMU is a model of diesel multiple unit passenger train designed and manufactured by Nippon Sharyo for the North American market, and compliant with FRA Tier 1 crashworthiness standards. It has been ordered by Sonoma–Marin Area Rail Transit (SMART) in Sonoma and Marin Counties, California, and by Metrolinx for the Union Pearson Express airport link in Toronto, Ontario.
The TriMet transit system, serving the Portland metropolitan area in Oregon, owns and operates two different rail transit systems: a light rail system known as MAX, and a commuter rail system known as WES. The fleet of 145 MAX electric light rail vehicles (LRVs) includes five different models, designated by TriMet as "Type 1" through "Type 6". All types are used on all of the MAX lines, but the Type 6 cars – which will gradually replace the Type 1 cars – are still being delivered and have not yet begun to enter service. The comparatively very small WES fleet includes three different types of diesel commuter rail cars.
