Railroad car in the context of "Multiple unit"

A well car, also known as a double-stack car (or also intermodal car/container car), is a type of railroad car specially designed to carry intermodal containers (shipping containers) used in intermodal freight transport. The "well" is a depressed section that sits close to the rails between the wheel trucks of the car, allowing a container to be carried lower than on a traditional flatcar. This makes it possible to carry a stack of two containers per unit on railway lines (double-stack rail transport) wherever the structure gauge assures sufficient clearance.

The top container is secured to the bottom container either by a bulkhead built into the car — possible when bottom and top containers are the same dimensions, or through the use of inter-box connectors (IBC). Four IBCs are needed per well car. In the terminal there are four steps: unlock and lift off the top containers of an inbound train, remove the bottom containers, insert outbound bottom containers, lock assembly after top containers emplaced. Generally this is done car-by-car unless multiple crane apparatus are employed.

The Greenbrier Companies is an American publicly traded transportation manufacturing corporation based in Lake Oswego, Oregon, United States. Greenbrier specializes in transportation services, notably freight railcar manufacturing, railcar refurbishment and railcar leasing/management services. The company is one of the leading designers, manufacturers and marketers of rail freight equipment in North America and Europe. It also has operations in South America, Poland, Romania and Turkey. Greenbrier is a leading provider of railcars, wheelsets, parts, management, leasing and other services to the railroad and related transportation industries in North America. As of August 31, 2021, Greenbrier employs 15,400 people across its global operations. Formed in 1981 and publicly traded since 1994, the company generates revenues of US$3.49 billion.

The company has manufacturing facilities in Paragould and Marmaduke, Arkansas; Świdnica, Poland; Hortolândia, Brazil; and Adana, Turkey, as well as three railcar manufacturing facilities in Mexico (Monclova, Ciudad Sahagún, and Tlaxcala) and three in Romania (Arad, Caracal, and Drobeta-Turnu Severin).

The term rolling stock in the rail transport industry refers to railway vehicles, including both powered and unpowered vehicles: for example, locomotives, freight and passenger cars (or coaches), and non-revenue cars. Passenger vehicles can be un-powered, or self-propelled, single or multiple units.

In North America, Australia and other countries, the term consist (/ˈkɒnsɪst/ KON-sist) is used to refer to the rolling stock comprising a train, a list containing specific information for each car of a train, or a group of locomotives.

A train (from Old French trahiner, from Latin trahere, "to pull, to draw") is a series of connected vehicles that run along a railway track and transport people or freight. Trains are typically pulled or pushed by locomotives (often known simply as "engines"), though some are self-propelled, such as multiple units or railcars. Passengers and cargo are carried in railroad cars, also known as wagons or carriages. Trains are designed to a certain gauge, or distance between rails. Most trains operate on steel tracks with steel wheels, the low friction of which makes them more efficient than other forms of transport. Many countries use rail transport.

Trains have their roots in wagonways, which used railway tracks and were powered by horses or pulled by cables. Following the invention of the steam locomotive in the United Kingdom in 1802, trains rapidly spread around the world, allowing freight and passengers to move over land faster and cheaper than ever possible before. Rapid transit and trams were first built in the late 1800s to transport large numbers of people in and around cities. Beginning in the 1920s, and accelerating following World War II, diesel and electric locomotives replaced steam as the means of motive power. Following the development of cars, trucks, and extensive networks of highways which offered greater mobility, as well as faster airplanes, trains declined in importance and market share, and many rail lines were abandoned. The spread of buses led to the closure of many rapid transit and tram systems during this time as well.

An amphibious vehicle (or simply amphibian) is a vehicle that works both on land and on or under water. Amphibious vehicles include amphibious bicycles, ATVs, cars, buses, trucks, railway vehicles, combat vehicles, and hovercraft.

Classic landing craft are not amphibious vehicles as they do not work on land, although they are part of amphibious warfare. Ground effect vehicles, such as ekranoplans, would likely crash on any but the flattest of landmasses so are also not considered to be amphibious vehicles.

A truck scale (US), weighbridge (non-US) or railroad scale is a large set of scales, usually mounted permanently on a concrete foundation, that is used to weigh entire rail or road vehicles and their contents. By weighing the vehicle both empty and when loaded, the load carried by the vehicle can be calculated.

The key component that uses a weighbridge in order to make the weigh measurement is load cells.

The Sassi–Superga tramway is a steep grade railway line in the city of Turin in northern Italy. Managed by Gruppo Torinese Trasporti, it connects the Turin suburb of Sassi to the Basilica of Superga at an altitude of 672 m (2,205 ft). The lower station is situated at an altitude of 225 m (738 ft) a.s.l., the upper at 650 m (2,130 ft). From here, high in the hills facing the city across the River Po, a panorama of Turin is visible against a backdrop of the Alps. Intermediate stops (only on demand) are located at Prima Galleria, Raddoppio, and Pian Gambino.

The line was opened on 27 April 1884 as a cable driven rack railway of the Agudio system. In this system cables ran along the side of the track and passed around two large pulleys on each side of the cars, which in turn drove the cog wheels that propelled the train consisting of the driven car (only occupied by the driver and a brakeman) and up to three passenger cars. The cable was originally driven by a steam engine in the upper station, from 1922 on by an electric motor. During World War I passenger numbers dropped sharply, so that the line was temporarily shut down until 1919.

A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. The wheel acts as a rolling component, typically press fitted on to an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie (CwthE) or truck (NAmE). The powered wheels under the locomotive are called driving wheels. Wheels are initially cast or forged and then heat-treated to have a specific hardness. New wheels are machined using a lathe to a standardised shape, called a profile. All wheel profiles are regularly checked to ensure proper interaction between the wheel and the rail. Incorrectly profiled wheels and worn wheels can increase rolling resistance, reduce energy efficiency and may even cause a derailment. The International Union of Railways has defined a standard wheel diameter of 920 mm (36 in), although smaller sizes are used in some rapid transit railway systems and on ro-ro carriages.

A wheelset is a pair of railroad vehicle wheels mounted rigidly on an axle. Wheelsets are often mounted in a bogie ("truck" in North America) – a pivoted frame assembly holding at least two wheelsets – at each end of the vehicle. Most modern freight cars and passenger cars have bogies each with two wheelsets, but three wheelsets (or more) are used in bogies of freight cars that carry heavy loads, and three-wheelset bogies are under some passenger cars. Four-wheeled goods wagons that were once near-universal in Europe and Great Britain and their colonies have only two wheelsets; in recent decades such vehicles have become less common as trainloads have become heavier.

A rack and pinion is a type of linear actuator that comprises a circular gear (the pinion) engaging a linear gear (the rack). Together, they convert between rotational motion and linear motion: rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate.

The rack and pinion mechanism is used in rack railways, where the pinion mounted on a locomotive or a railroad car engages a rack usually placed between the rails, and helps to move the train up a steep gradient. It is also used in arbor presses and drill presses, where the pinion is connected to a lever and displaces a vertical rack (the ram). In pipelines and other industrial piping systems, a rack displaced by a linear actuator turns a pinion to open or close a valve. Stairlifts, lock gates, electric gates, and the mechanical steering mechanism of cars are other notable applications.