Rail technologies

thumb|upright=1.1|Railroad car Train wheel|wheels affixed to a straight axle, limiting them to rotate in unison. This is called a wheelset. thumb|upright=1.1|A Denney axle An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear

thumb|upright|Funicular in Baku, Azerbaijan

linear bearing and guide elements used in rail transport

railway with a toothed rack rail, usually with steep grade and low operating speed

thumb|upright=1.2|Bogie on a Czech Railways side-tipper car

alt=Train wreck in Leavick, Colorado in 1897|thumb|Train wreck in Leavick, Colorado in 1897 thumb|right|250px|A picture by "C. Petersen" [[Fayette County, Texas [?] of a train derailment]] thumb|2002 Farragut derailment|A derailed freight train in Farragut, [[Tennessee (2002)]]

part of the coupling system used in some railway systems for attaching railway vehicles to one another

study of engineering principles necessary for railway construction and operation

cable-hauled mass transit system

railway that uses differential air pressure to provide power for propulsion of a railway vehicle

thumb|High-capacity bus rapid transit systems such as [[TransMilenio are capable of very short headways, measured in seconds]] Headway is the distance or duration between vehicles in a transportation system. The minimum headway is the shortest such distance or time achievable by a system without a reduction in the speed of vehicles. The precise definition varies depending on the application, but it is most commonly measured as the distance from the tip (front end) of one vehicle to the tip of the next one behind it. It can be expressed as the distance between vehicles, or as time it will take

step fitted under doors of vehicles

company

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form of a cable railway system for steep gradient, similar to a funicular

railway that uses a cable, rope or chain to haul trains

railway which relies on adhesion traction to move a train

Inductrack is a passive, fail-safe electrodynamic magnetic levitation system, using only unpowered loops of wire in the track and permanent magnets (arranged into Halbach arrays) on the vehicle to achieve magnetic levitation. The track can be in one of two configurations, a "ladder track" and a "laminated track". The ladder track is made of unpowered Litz wire cables, and the laminated track is made out of stacked copper or aluminium sheets.

self-oscillation about an equilibrium that is usually unwanted

electric train heating by locomotives

railway track without joints

technology that disables individual sets of doors on transit vehicles or buildings

flexible connector fitted to the end of a railway coach, enabling passengers to move from one coach to another

third-rail system for railways that are too steeply-graded to be worked by adhesion

A hierarchical combination of two network levels for data transmission within trains

safety device mounted to rear of a train

mechanism that aligns the points with one of the possible routes

type of inspection