Communication

347 relations: Absolute block signalling, Adhesion railway, Adhesive weight, Albany, New York, Alternating current, Alternator, Aluminium, American Locomotive Company, Anatole Mallet, Articulated locomotive, Articulated vehicle, Aspirator (pump), Association of American Railroads, Atchison, Topeka and Santa Fe Railway, Atmospheric pressure, Automatic block signaling, Automatic train control, Automatic train operation, Automatic train protection, Autorack, B unit, Balise, Balloon loop, Bay platform, Beep (locomotive), Blastpipe, Bo-Bo, Bogie, Boiler, Boom barrier, Booster engine, Brake van, Brakeman's cabin, Branch line, British Rail Class 121, British Rail Class 153, British Rail Universal Trolley Equipment, British railway milk trains, British Transport Commission, Broad-gauge railway, Buffer (rail transport), Buffer stop, Builder's plate, Cab (locomotive), Cab forward, Cab unit, Caboose, Cant (road/rail), Chamfer, Chicago, ..., Chicago and North Western Transportation Company, Chicago, Burlington and Quincy Railroad, Class U special wagon, Classification yard, Co-Co locomotives, Compound locomotive, Compressed air, Control car, Coupling rod, Covered goods wagon, Cow-calf, Crankpin, Crosshead, CSX Transportation, Cut (earthmoving), Cutoff (steam engine), Cylinder (engine), Dark territory, Dead man's switch, Dead-man's vigilance device, Defect detector, Densha Otoko, Derail, Detonator (railway), Diesel locomotive, Diesel multiple unit, Direct traffic control, Distributed power, Doodlebug (rail car), Double heading, Dover Publications, Drag freight, Draisine, Driving wheel, Dwell time (transportation), Dynamic braking, Electric generator, Electric locomotive, Electric multiple unit, Electro-Motive Diesel, Elevated railway, Embankment (transportation), EMD GP18, EMD GP7, EMD GP9, Encyclopædia Britannica, End-of-train device, Engine balance, Engineer's Line Reference, Engineering tolerance, Express train, F&W Media International, Facing and trailing, Fairlie 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Appliance Act, Railroad switch, Railroadiana, Railway air brake, Railway coupling, Railway electrification system, Railway platform, Railway roundhouse, Railway semaphore signal, Railway signal, Railway signalling, Railway turntable, Rapid transit, Red, Refrigerator car, Refuge siding, Regional rail, Reporting mark, Retarder (railroad), Reverser handle, Reversing gear, Right-of-way (transportation), Roadrailer, Rolling stock, Rolling-element bearing, Rookie, Roots-type supercharger, Rotary snowplow, Ruling gradient, Sand, Sandbox (locomotive), Sandite, Schnabel car, Section (rail transport), Shay locomotive, Shuttle train, Siding (rail), Sight glass, Signal passed at danger, Signalling block system, Signalling control, Signalman (rail), Simmons-Boardman Publishing, Sleeping car, Slippery rail, Slow order, Slug (railroad), Smokebox, Snow shed, Snowplow, Southern Pacific Transportation Company, Span bolster, Spreader (railroad), Standard-gauge railway, Station master, Steam engine, Steam generator (railroad), Steam locomotive, Structure gauge, Supercharger, Superheated steam, Superheater, Surveying, Switcher, Switching and terminal railroad, Switchman, Tamping machine, Tank car, Tank locomotive, Team track, Tender (rail), The New York Times, The New York Times Company, Thermite, Third rail, Throttle, Through coach, Token (railway signalling), Top and tail, Track (rail transport), Track ballast, Track bed, Track circuit, Track gauge, Track transition curve, Traction motor, Tractive force, Trailing wheel, Train, Train dispatcher, Train event recorder, Train horn, Train operating company, Train order operation, Train station, Train wheel, Train whistle, Trains (magazine), Tram, Tram-train, Treadle (railway), Two-stroke diesel engine, Underframe, Union Pacific Railroad, Unit train, Utah Transit Authority, Vacuum, Vacuum brake, Valve gear, Vehicle, Water crane, Welding, Wheel–rail interface, Wheeltapper, Whistle post, Whyte notation, Wigwag (railroad), Wrong-side failure, Yellow, Zig zag (railway), 2-10-0, 2-10-2, 2-10-4, 2-6-0, 2-6-2, 2-8-0, 2-8-2, 2-8-4, 4-4-0, 4-4-2 (locomotive), 4-4-4, 4-6-2, 4-6-4, 4-6-6-4, 4-8-2, 4-8-4. 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Absolute block signalling

Absolute block signalling is a British signalling scheme designed to ensure the safe operation of a railway by allowing only one train to occupy a defined section of track (block) at any time.

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Adhesion railway

An adhesion railway relies on adhesion traction to move the train.

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Adhesive weight

Adhesive weight is the weight on the driving wheels of a locomotive, which determines the frictional grip between wheels and rail, and hence the drawbar pull which a locomotive can exert.

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Albany, New York

Albany is the capital of the U.S. state of New York and the seat of Albany County.

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Alternating current

Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.

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Alternator

An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current.

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Aluminium

Aluminium or aluminum is a chemical element with symbol Al and atomic number 13.

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American Locomotive Company

The American Locomotive Company, often shortened to ALCO, ALCo or Alco, designed, built and sold steam locomotives, diesel-electric locomotives, diesel engines and generators, specialized forgings, high quality steel, armed tanks and automobiles and produced nuclear energy.

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Anatole Mallet

Jules T. Anatole Mallet (23 May 1837 – 10 October 1919) was a Swiss mechanical engineer, who was the inventor of the first successful compound system for a railway steam locomotive, patented in 1874.

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Articulated locomotive

The term "articulated locomotive" usually means a steam locomotive with one or more engine units which can move independent of the main frame.

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Articulated vehicle

An articulated vehicle is a vehicle which has a permanent or semi-permanent pivot joint in its construction, allowing the vehicle to turn more sharply.

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Aspirator (pump)

An aspirator is a type of ejector-jet pump, which produces vacuum by means of the Venturi effect.

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Association of American Railroads

The Association of American Railroads (AAR) is an industry trade group representing primarily the major freight railroads of North America (Canada, Mexico and the United States).

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Atchison, Topeka and Santa Fe Railway

The Atchison, Topeka and Santa Fe Railway, often referred to as the Santa Fe or AT&SF, was one of the larger railroads in the United States.

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Atmospheric pressure

Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).

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Automatic block signaling

Automatic block signaling (ABS) is a railroad communications system that consists of a series of signals that divide a railway line into a series of sections, or "blocks".

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Automatic train control

Automatic train control (ATC) is a general class of train protection systems for railways that involves a speed control mechanism in response to external inputs.

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Automatic train operation

Automatic train operation (ATO) is an operational safety enhancement device used to help automate operations of trains.

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Automatic train protection

Automatic train protection (ATP) is a type of train protection system which continually checks that the speed of a train is compatible with the permitted speed allowed by signalling.

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Autorack

An autorack, also known as an auto carrier (also car transporter outside the US), is a specialized piece of railroad rolling stock used to transport automobiles and light trucks.

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B unit

A B unit, in railroad terminology, is a locomotive unit (generally a diesel locomotive) which does not have a driving cab or crew compartment, and must therefore be controlled from another, coupled locomotive with a driving cab (an A unit).

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Balise

A balise is an electronic beacon or transponder placed between the rails of a railway as part of an automatic train protection (ATP) system.

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Balloon loop

A balloon loop, turning loop or reversing loop (North American) allows a rail vehicle or train to reverse direction without having to shunt or even stop.

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Bay platform

In the United Kingdom and in Australia, a bay platform is a dead-end railway platform at a railway station that has through lines.

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Beep (locomotive)

The "Beep" (also referred to as the SWBLW) is an individual switcher locomotive built in 1970 by the Atchison, Topeka and Santa Fe Railway at its Cleburne, Texas, workshops.

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Blastpipe

The blastpipe is part of the exhaust system of a steam locomotive that discharges exhaust steam from the cylinders into the smokebox beneath the chimney in order to increase the draught through the fire.

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Bo-Bo

B-B and Bo-Bo are the Association of American Railroads (AAR) and British classifications of wheel arrangement for railway locomotives with four axles in two individual bogies.

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Bogie

A bogie (in some senses called a truck in North American English) is a chassis or framework carrying wheelsets, attached to a vehicle, thus serving as a modular subassembly of wheels and axles.

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Boiler

A boiler is a closed vessel in which fluid (generally water) is heated.

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Boom barrier

A boom barrier, also known as a boom gate, is a bar, or pole pivoted to allow the boom to block vehicular access through a controlled point.

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Booster engine

A booster engine for steam locomotives is a small two-cylinder steam engine back-gear-connected to the trailing truck axle on the locomotive or, if none, the lead truck on the tender.

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Brake van

Brake van and guard's van are terms used mainly in the UK, Australia and India for a railway vehicle equipped with a hand brake which can be applied by the guard.

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Brakeman's cabin

A brakeman's cabin (also brakeman's cab) or brakeman's caboose (US) was a small one-man compartment at one end of a railway wagon to provide shelter for the brakeman from the weather and in which equipment for manually operating the wagon brake was located.

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Branch line

A branch line is a secondary railway line which branches off a more important through route, usually a main line.

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British Rail Class 121

Sixteen Class 121 single-car, double-ended driving motor vehicles were built from 1960, numbered 55020–55035.

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British Rail Class 153

The British Rail Class 153 ''Super Sprinter'' are single-coach diesel multiple units converted from two-coach Class 155s.

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British Rail Universal Trolley Equipment

British Rail Universal Trolley Equipment (BRUTEs) were trolleys used from 1964 until 1999 for sorting, handling and transport by rail of parcels, newspapers, etc.

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British railway milk trains

Milk trains were a common sight on the railways of Great Britain from the early 1930s to the late 1960s.

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British Transport Commission

The British Transport Commission (BTC) was created by Clement Attlee's post-war Labour government as a part of its nationalisation programme, to oversee railways, canals and road freight transport in Great Britain (Northern Ireland had the separate Ulster Transport Authority).

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Broad-gauge railway

A broad-gauge railway is a railway with a track gauge broader than the standard-gauge railways.

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Buffer (rail transport)

A buffer is a part of the buffers-and-chain coupling system used on the railway systems of many countries, among them most of those in Europe, for attaching railway vehicles to one another.

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Buffer stop

A buffer stop, bumper, bumping post, bumper block or stopblock (US), is a device to prevent railway vehicles from going past the end of a physical section of track.

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Builder's plate

A builder's plate is usually a metal plate that is attached to rolling stock, bogies, construction equipment, trucks, automobiles, large household appliances, bridges, ships and more.

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Cab (locomotive)

The cab, crew compartment or driver's compartment of a locomotive, or a self-propelled rail vehicle, is the part housing the train driver or engineer, the fireman or driver's assistant (secondman) (if any), and the controls necessary for the locomotive's, or self-propelled rail vehicle's, operation.

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Cab forward

The term cab forward refers to various rail and road vehicle designs that place the driver's compartment substantially farther towards the front than is common practice.

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Cab unit

A cab unit and a carbody unit are body styles of locomotives in North American railroad terminology.

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Caboose

A caboose is a manned North American railroad car coupled at the end of a freight train.

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Cant (road/rail)

The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges.

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Chamfer

A chamfer is a transitional edge between two faces of an object.

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Chicago

Chicago, officially the City of Chicago, is the third most populous city in the United States, after New York City and Los Angeles.

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Chicago and North Western Transportation Company

The Chicago and North Western Transportation Company was a Class I railroad in the Midwestern United States.

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Chicago, Burlington and Quincy Railroad

The Chicago, Burlington and Quincy Railroad was a railroad that operated in the Midwestern United States.

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Class U special wagon

The International Union of Railways groups all special classes of railway goods wagon (less those in classes F, H, L, S or Z) into Class U in its goods wagon classification system.

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Classification yard

A classification yard (American and Canadian English) or marshalling yard (British, Hong Kong, Indian, Australian and Canadian English) is a railway yard found at some freight train stations, used to separate railway cars onto one of several tracks.

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Co-Co locomotives

Co-Co is the wheel arrangement for a diesel locomotive with two six-wheeled bogies with all axles powered, with a separate motor per axle.

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Compound locomotive

A compound locomotive is a steam locomotive which is powered by a compound engine, a type of steam engine where steam is expanded in two or more stages.

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Compressed air

Compressed air is air kept under a pressure that is greater than atmospheric pressure.

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Control car

A control car, control trailer or driving trailer is a generic term for a non-powered railroad (US) or railway (UIC) vehicle that can control operation of a train from the end opposite to the position of the locomotive.

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Coupling rod

A coupling rod or side rod connects the driving wheels of a locomotive.

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Covered goods wagon

A covered goods wagon or van is a railway goods wagon which is designed for the transportation of moisture-susceptible goods and therefore fully enclosed by sides and a fixed roof.

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Cow-calf

In North American railroading, a cow-calf (also cow and calf) locomotive is a set of switcher-type diesel locomotives.

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Crankpin

A crankpin or crank journal is a journal in an engine or mechanical device.

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Crosshead

A crosshead is a mechanism used in long reciprocating engines and reciprocating compressors to eliminate sideways pressure on the piston.

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CSX Transportation

CSX Transportation is a Class I railroad operating in the eastern United States and the Canadian provinces of Ontario and Quebec.

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Cut (earthmoving)

In civil engineering, a cut or cutting is where soil or rock material from a relative rise (elevated landscape) to an earlier section of the route is cut out to make way for a further section of the route, whether canal, road or railway line.

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Cutoff (steam engine)

In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed.

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Cylinder (engine)

A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels.

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Dark territory

Dark territory is a term used in the North American railroad industry to describe a section of running track not controlled by signals.

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Dead man's switch

A dead man's switch (for other names, see alternative names) is a switch that is automatically operated if the human operator becomes incapacitated, such as through death, loss of consciousness, or being bodily removed from control.

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Dead-man's vigilance device

A dead-man's vigilance device is a railroad safety device that operates in the case of incapacitation of the engineer.

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Defect detector

A defect detector is a device used on railroads to detect axle and signal problems in passing trains.

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Densha Otoko

is a Japanese movie, television series, manga, novel, and other media, all based on the purportedly true story of a 23-year-old otaku who intervened when a drunk man started to harass several women on a train.

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Derail

A derail or derailer is a device used to prevent fouling (blocking or compromising) of a rail track (or collision with anything present on the track, such as a person, a train or a fallen branch) by unauthorized movements of trains or unattended rolling stock.

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Detonator (railway)

A railway detonator (torpedo in North America) is a coin-sized device that is used as a loud warning signal to train drivers.

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Diesel locomotive

A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine.

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Diesel multiple unit

A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines.

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Direct traffic control

Direct traffic control (DTC) is a system for authorizing track occupancy used on some railroads instead of or in addition to signals.

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Distributed power

In rail transport, distributed power (DP) is a generic term referring to the physical distribution—at intermediate points throughout the length of a train—of separate motive power groups.

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Doodlebug (rail car)

In the United States, doodlebug or hoodlebug is a name for a type of self-propelled railcar most commonly configured with both a passenger and freight compartment.

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Double heading

In railroad terminology, double heading indicates the use of two locomotives at the front of a train, each operated individually by its own crew.

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Dover Publications

Dover Publications, also known as Dover Books, is an American book publisher founded in 1941 by Hayward Cirker and his wife, Blanche.

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Drag freight

A drag freight is a slow, high-tonnage railroad train, often carrying commodities such as coal or ore.

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Draisine

A draisine is a light auxiliary rail vehicle, driven by service personnel, equipped to transport crew and material necessary for the maintenance of railway infrastructure.

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Driving wheel

On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive).

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Dwell time (transportation)

In transportation, dwell time or terminal dwell time refers to the time a vehicle such as a public transit bus or train spends at a scheduled stop without moving.

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Dynamic braking

Dynamic braking is the use of an electric traction motor as a generator when slowing a vehicle such as an electric or diesel-electric locomotive.

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Electric generator

In electricity generation, a generator is a device that converts motive power (mechanical energy) into electrical power for use in an external circuit.

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Electric locomotive

An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor.

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Electric multiple unit

An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages, using electricity as the motive power.

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Electro-Motive Diesel

Electro-Motive Diesel (EMD) is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry.

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Elevated railway

An elevated railway (also known as an El rail, El train or simply an El for short, and, in Europe, as an overhead railway) is a rapid transit railway with the tracks above street level on a viaduct or other elevated structure (usually constructed of steel, concrete, or brick).

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Embankment (transportation)

A road, railway line or canal is normally raised onto an embankment made of compacted soil (typically clay or rock-based) to avoid a change in level required by the terrain, the alternatives being either to have an unacceptable change in level or detour to follow a contour.

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EMD GP18

An EMD GP18 is a 4-axle diesel-electric locomotive built by General Motors, Electro-Motive Division between December 1959 and November 1963.

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EMD GP7

The EMD GP7 is a four-axle (B-B) road switcher diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October 1949 and May 1954.

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EMD GP9

An EMD GP9 is a four-axle diesel-electric locomotive built by General Motors' Electro-Motive Division in the United States, and General Motors Diesel in Canada between January, 1954, and August, 1963.

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Encyclopædia Britannica

The Encyclopædia Britannica (Latin for "British Encyclopaedia"), published by Encyclopædia Britannica, Inc., is a general knowledge English-language encyclopaedia.

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End-of-train device

The end of train device (ETD), sometimes referred to as an EOT, flashing rear-end device (FRED) or sense and braking unit (SBU) is an electronic device mounted on the end of freight trains in lieu of a caboose.

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Engine balance

Engine balance refers to those factors in the design, production, engine tuning, maintenance and the operation of an engine that benefit from being balanced.

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Engineer's Line Reference

An Engineer's Line Reference (or ELR for short) is a three or four-character code used in the British rail network to refer to a section of a track or route.

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Engineering tolerance

Engineering tolerance is the permissible limit or limits of variation in.

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Express train

Express trains (also sometimes referred to as fast trains, though this is a relative term, usually meaning "faster than some other trains on the line in question") are a form of rail service.

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F&W Media International

F&W Media International Limited, formerly known as David & Charles Publishers (also styled as David and Charles), is a publisher of illustrated non-fiction books, eBooks, digital products, craft patterns and online education courses.

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Facing and trailing

Facing and trailing are terms used to describe railway turnouts (or 'points' in the UK) in respect to whether they are divergent or convergent.

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Fairlie locomotive

A Fairlie is a type of articulated steam locomotive that has the driving wheels on bogies.

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Feedwater heater

A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler.

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Fiddle yard

A fiddle yard or staging yard is a collection of model railway tracks that are hidden from view and allow trains to be stored and manipulated by the operators.

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Firebox (steam engine)

In a steam engine, the firebox is the area where the fuel is burned, producing heat to boil the water in the boiler.

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Fireman (steam engine)

Fireman or stoker is the job title for someone whose job is to tend the fire for the running of a boiler, to heat a building, power a steam engine, etc.

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Flare

A flare, also sometimes called a fusee, is a type of pyrotechnic that produces a brilliant light or intense heat without an explosion.

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Flat spot

A flat spot, or wheel flat, is a fault in railroad wheel shape.

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Flat wagon

Flat wagons (sometimes flat beds, flats or rail flats, US: flatcars), as classified by the International Union of Railways (UIC), are railway goods wagons that have a flat, usually full-length, deck (or 2 decks on car transporters) and little or no superstructure.

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Flatcar

A flatcar (US) (also flat car (US) or flat wagon (UIC)) is a piece of railroad (US) or railway (non-US) rolling stock that consists of an open, flat deck mounted on a pair of trucks (US) or bogies (UK), one at each end containing four or six wheels.

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Flying junction

A flying junction or flyover is a railway junction at which one or more diverging or converging tracks in a multiple-track route cross other tracks on the route by bridge to avoid conflict with other train movements.

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Footplate

The footplate of a steam locomotive is a large metal plate that rests on top of the frames and is normally covered with wooden floorboards.

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Force

In physics, a force is any interaction that, when unopposed, will change the motion of an object.

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Four-quadrant gate

A four-quadrant gate is a type of boom barrier gate protecting a grade crossing.

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Free-mo

Free-mo stands for "free modular" and is a relatively new modular standard in the hobby of model railroading.

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Friction

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.

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Fusible plug

A fusible plug is a threaded metal cylinder usually of bronze, brass or gunmetal, with a tapered hole drilled completely through its length.

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Garratt

A Garratt (often referred to as a Beyer Garratt) is a type of steam locomotive that is articulated into three parts.

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GE Evolution Series

The Evolution Series is a line of diesel locomotives built by GE Transportation Systems, initially designed to meet the U.S. EPA's Tier 2 locomotive emissions standards that took effect in 2005.

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General Electric

General Electric Company (GE) is an American multinational conglomerate incorporated in New York and headquartered in Boston, Massachusetts.

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General Motors

General Motors Company, commonly referred to as General Motors (GM), is an American multinational corporation headquartered in Detroit that designs, manufactures, markets, and distributes vehicles and vehicle parts, and sells financial services.

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Geneva

Geneva (Genève, Genèva, Genf, Ginevra, Genevra) is the second-most populous city in Switzerland (after Zürich) and the most populous city of the Romandy, the French-speaking part of Switzerland.

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Gladhand connector

A gladhand connector or gladhand coupler is an interlocking hose coupling fitted to hoses supplying pressurized air from a tractor unit to air brakes on a semi-trailer, or from a locomotive to railway air brakes on railroad cars.

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Glossary of Australian railway terms

This page contains a list of jargon used to varying degrees by railfans, trainspotters, and railway employees in Australia, including nicknames for various locomotives and multiple units.

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Glossary of boiler terms

Boilers for generating steam or hot water have been designed in countless shapes, sizes and configurations.

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Glossary of New Zealand railway terms

This is a list of jargon commonly used by railfans and railway employees in New Zealand.

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Glossary of North American railway terms

This page contains a list of terms, jargon, and slang used to varying degrees by railfans and railroad employees in the United States and Canada.

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Glossary of United Kingdom railway terms

This page contains a list of jargon used to varying degrees by railfans, trainspotters, and railway employees in the United Kingdom, including nicknames for various locomotives and multiple units.

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Goods wagon

Goods wagons or freight wagons (North America: goods cars or freight cars) are unpowered railway vehicles that are used for the transportation of cargo.

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GWR Autocoach

The GWR Autocoach (or auto-trailer) is a type of coach that was used by the Great Western Railway for push-pull trains powered by a steam locomotive.

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Handcar

A handcar (also known as a pump trolley, pump car, jigger, Kalamazoo, velocipede, or draisine) is a railroad car powered by its passengers, or by people pushing the car from behind.

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Headboard (train)

A headboard is a board hung on the front of a locomotive.

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Headstock (rolling stock)

A headstock of a rail vehicle is a transverse structural member located at the extreme end of the vehicle's underframe.

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High rail

High rail (also called "hi-rail" and "hirail") is a phrase used in model railroading in North America, mostly in O scale and S scale, to describe a "compromise" form of modelling that strives for realism while accepting the compromises in scale associated with toy train equipment.

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History of the steam engine

The first recorded rudimentary steam engine was the aeolipile described by Heron of Alexandria in 1st-century Roman Egypt.

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Hot box

A hot box is the term used when an axle bearing overheats on a piece of railway rolling stock.

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Hunting oscillation

Hunting oscillation is a self-oscillation, usually unwanted, about an equilibrium.

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Ian Allan Publishing

Ian Allan Publishing is a UK publisher, established in 1942, which specialised in transport books.

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Induction motor

An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.

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Infill station

An infill station (sometimes in-fill station) is a train station built on an existing passenger rail, rapid transit, or light rail line to address demand in a location between existing stations.

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Infobase Publishing

Infobase Publishing is an American publisher of reference book titles and textbooks geared towards the North American library, secondary school, and university-level curriculum markets.

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Infrastructure

Infrastructure is the fundamental facilities and systems serving a country, city, or other area, including the services and facilities necessary for its economy to function.

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Injector

A steam injector is typically used to deliver cold water to a boiler against its own pressure using its own live or exhaust steam, replacing any mechanical pump.

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Interlocking

In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings.

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Intermodal freight transport

Intermodal freight transport involves the transportation of freight in an intermodal container or vehicle, using multiple modes of transportation (e.g., rail, ship, and truck), without any handling of the freight itself when changing modes.

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Intermodal passenger transport

Intermodal passenger transport, also called mixed-mode commuting, involves using two or more modes of transportation in a journey.

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Internal combustion engine

An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.

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International Electrotechnical Commission

The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

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International Union of Railways

The UIC (Union Internationale des Chemins de fer) or International Union of Railways is an international rail transport industry body.

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Intersection (road)

An intersection is an at-grade junction where two or more roads meet or cross.

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Island platform

An island platform (also center platform, centre platform) is a station layout arrangement where a single platform is positioned between two tracks within a railway station, tram stop or transitway interchange.

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Janney coupler

The Janney Coupler is a semi-automatic railway coupler.

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Jargon

Jargon is a type of language that is used in a particular context and may not be well understood outside that context.

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Junction (rail)

A junction, in the context of rail transport, is a place at which two or more rail routes converge or diverge.

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Kalmbach Publishing

Kalmbach Publishing Co. is an American publisher of books and magazines, many of them railroad-related, located in Waukesha, Wisconsin.

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Level crossing

A level crossing is an intersection where a railway line crosses a road or path at the same level, as opposed to the railway line crossing over or under using a bridge or tunnel.

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Level junction

A level junction (or in the United Kingdom a flat crossing) is a railway junction that has a track configuration in which merging or crossing railroad lines provide track connections with each other that require trains to cross over in front of opposing traffic at grade (i.e. on the level).

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Lever

A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum.

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Lever frame

Mechanical railway signalling installations rely on lever frames for their operation to interlock the signals and points to allow the safe operation of trains in the area the signals control.

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Light rail

Light rail, light rail transit (LRT), or fast tram is a form of urban rail transport using rolling stock similar to a tramway, but operating at a higher capacity, and often on an exclusive right-of-way.

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List of railroad truck parts

A bogie or railroad truck holds the wheel sets of a rail vehicle.

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Loading gauge

A loading gauge defines the maximum height and width for railway vehicles and their loads to ensure safe passage through bridges, tunnels and other structures.

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Locomotive

A locomotive or engine is a rail transport vehicle that provides the motive power for a train.

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Main line (railway)

The main line, or mainline in American English, of a railway is a track that is used for through trains or is the principal artery of the system from which branch lines, yards, sidings and spurs are connected.

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Merry-go-round train

A merry-go-round train, often abbreviated to MGR, is a block train of hopper wagons which both loads and unloads its cargo while moving.

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Metropolitan Transportation Authority

The Metropolitan Transportation Authority (MTA) is a public benefit corporation responsible for public transportation in the U.S. state of New York, serving 12 counties in Downstate New York, along with two counties in southwestern Connecticut under contract to the Connecticut Department of Transportation, carrying over 11 million passengers on an average weekday systemwide, and over 850,000 vehicles on its seven toll bridges and two tunnels per weekday.

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Minimum railway curve radius

The minimum railway curve radius is the shortest allowable design radius for the centre line of railway tracks under a particular set of conditions.

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Modalohr

The Lohr Railway System or Modalohr System (Système Modalohr) uses special railway wagons of a type known as piggyback wagons, to carry standard road semi-trailers on the European rail network.

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Moon

The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

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Multiple unit

A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined together, which when coupled to another multiple unit can be controlled by a single driver.

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Nameplate

A nameplate identifies and displays a person or product's name.

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Narrow-gauge railway

A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than the standard.

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National Transportation Safety Board

The National Transportation Safety Board (NTSB) is an independent U.S. government investigative agency responsible for civil transportation accident investigation.

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New York City

The City of New York, often called New York City (NYC) or simply New York, is the most populous city in the United States.

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New York City Subway

The New York City Subway is a rapid transit system owned by the City of New York and leased to the New York City Transit Authority, a subsidiary agency of the state-run Metropolitan Transportation Authority (MTA).

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Office of Rail and Road

The Office of Rail and Road (ORR) is a non-ministerial government department responsible for the economic and safety regulation of Britain's railways, and the economic monitoring of Highways England.

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One-man operation

One-man operation (OMO), also known as driver-only operation (DOO), one person operation (OPO), single person train operation (SPTO), or one-person train operation (OPTO), is operation of a train, bus, or tram by the driver or motorman alone, without a conductor.

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Open wagon

Open wagons form a large group of railway goods wagons designed primarily for the transportation of bulk goods that are not moisture-retentive and can usually be tipped, dumped or shovelled.

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Overhead line

An overhead line or overhead wire is used to transmit electrical energy to trams, trolleybuses or trains.

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Pannier

A pannier is a basket, bag, box, or similar container, carried in pairs either slung over the back of a beast of burden, or attached to the sides of a bicycle or motorcycle.

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Pantograph (transport)

A pantograph (or "pan") is an apparatus mounted on the roof of an electric train, tram or electric bus to collect power through contact with an overhead line.

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Passenger rail terminology

Various terms are used for passenger rail lines and equipment-the usage of these terms differs substantially between areas.

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Passing loop

A passing loop (UK usage) or passing siding (North America) (also called a crossing loop, crossing place or, colloquially, a hole) is a place on a single line railway or tramway, often located at a station, where trains or trams travelling in opposite directions can pass each other.

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Pennsylvania Railroad

The Pennsylvania Railroad (or Pennsylvania Railroad Company and also known as the "Pennsy") was an American Class I railroad that was established in 1846 and was headquartered in Philadelphia, Pennsylvania.

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Per diem

Per diem (Latin for "per day" or "for each day") or daily allowance is a specific amount of money an organization gives an individual, often an employee, per day to cover living expenses when traveling for work.

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Pilot (locomotive)

In railroading, the pilot (also known as a cowcatcher or cattle catcher) is the device mounted at the front of a locomotive to deflect obstacles on the track that might otherwise derail the train.

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Piston

A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms.

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Plain bearing

A plain bearing, or more commonly sliding bearing and slide bearing (in railroading sometimes called a solid bearing or friction bearing), is the simplest type of bearing, comprising just a bearing surface and no rolling elements.

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Pony truck

A pony truck, in railway terminology, is a leading truck with only two wheels.

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Porter (railroad)

A porter is a railway employee.

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Portion working

In rail terminology, portion working refers to the operational practice of coupling two or more passenger trains together over common sections of their respective routes, but otherwise operating the trains separately.

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Portmanteau

A portmanteau or portmanteau word is a linguistic blend of words,, p. 644 in which parts of multiple words or their phones (sounds) are combined into a new word, as in smog, coined by blending smoke and fog, or motel, from motor and hotel.

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Positive train control

Positive train control (PTC) is a system of functional requirements for monitoring and controlling train movements and is a type of train protection system.

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Prime mover (locomotive)

In engineering, a prime mover is an engine that converts fuel to useful work.

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Push–pull train

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.

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Rack railway

A rack railway (also rack-and-pinion railway, cog railway, or cogwheel railway) is a steep grade railway with a toothed rack rail, usually between the running rails.

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Rail fastening system

A rail fastening system is a means of fixing rails to railroad ties (North America) or sleepers (British Isles, Australasia, and Africa).

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Rail profile

The rail profile is the cross sectional shape of a railway rail, perpendicular to its length.

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Rail replacement bus service

A rail replacement bus service uses buses to replace a passenger train service either on a temporary or permanent basis.

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Rail squeal

Rail squeal is a screeching train-track friction sound, commonly occurring on sharp curves.

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Rail transport modelling

Railway modelling (UK, Australia and Ireland) or model railroading (US and Canada) is a hobby in which rail transport systems are modelled at a reduced scale.

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Rail yard

A rail yard, railway yard or railroad yard is a complex series of railroad tracks for storing, sorting, or loading and unloading, railroad cars and locomotives.

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Railbus

A railbus is a lightweight passenger rail vehicle that shares many aspects of its construction with a bus, typically having a bus (original or modified) body and four wheels on a fixed base, instead of on bogies.

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Railcar

A railcar, in British English and Australian English, is a self-propelled railway vehicle designed to transport passengers.

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Railfan

A railfan, rail buff, or train buff (American English), railway enthusiast or railway buff (Australian/British English), trainspotter or anorak (British English, usually derogatory), is a person interested, recreationally, in rail transport.

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Railgrinder

A railgrinder (or rail grinder) is a maintenance of way vehicle or train used to restore the profile and remove irregularities from worn tracks to extend its life and to improve the ride of trains using the track.

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Railroad car

A railroad car or railcar (American and Canadian English), railway wagon or railway carriage (British English and UIC), also called a train car or train wagon, is a vehicle used for the carrying of cargo or passengers on a rail transport system (a railroad/railway).

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Railroad engineer

An engineer (American and Canadian), engine driver, train driver, loco pilot, motorman, train operator (British and Commonwealth English), is a person who operates a train.

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Railroad nicknames

The initials used to identify railroad and railway lines have often been used for humorous, disparaging or slanderous names.

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Railroad Safety Appliance Act

The Safety Appliance Act is a United States federal law that made air brakes and automatic couplers mandatory on all trains in the United States.

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Railroad switch

A railroad switch, turnout, or points is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off.

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Railroadiana

Railroadiana or railwayana refers to artifacts of currently or formerly operating railways around the world.

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Railway air brake

A railway air brake is a railway brake power braking system with compressed air as the operating medium.

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Railway coupling

A coupling (or a coupler) is a mechanism for connecting rolling stock in a train.

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Railway electrification system

A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply.

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Railway platform

A railway platform is an area – normally paved or otherwise prepared for pedestrian use, and often raised to a greater or lesser degree – provided alongside one or more of the tracks at a railway or metro station for use by passengers awaiting, boarding, or alighting from trains.

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Railway roundhouse

A roundhouse is a building with a circular or semicircular shape used by railroads for servicing and storing locomotives, and traditionally surrounds, or is adjacent to, a turntable.

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Railway semaphore signal

Semaphore is of the earliest forms of fixed railway signals.

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Railway signal

A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to engine drivers (engineers in North America).

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Railway signalling

Railway signalling is a system used to direct railway traffic and keep trains clear of each other at all times.

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Railway turntable

In rail terminology, a railway turntable or wheelhouse is a device for turning railway rolling stock, usually locomotives, so that they can be moved back in the direction from which they came.

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Rapid transit

Rapid transit or mass rapid transit, also known as heavy rail, metro, MRT, subway, tube, U-Bahn or underground, is a type of high-capacity public transport generally found in urban areas.

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Red

Red is the color at the end of the visible spectrum of light, next to orange and opposite violet.

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Refrigerator car

A refrigerator car (or "reefer") is a refrigerated boxcar (U.S.), a piece of railroad rolling stock designed to carry perishable freight at specific temperatures.

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Refuge siding

A refuge siding is a single-ended, or dead-end, siding off a running line, which may be used to temporarily accommodate a train so that another one can pass it.

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Regional rail

Regional rail, also known as local trains and stopping trains, are passenger rail services that operate between towns and cities.

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Reporting mark

A reporting mark is an alphabetic code of one to four letters used to identify owners or lessees of rolling stock and other equipment used on certain railroad networks.

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Retarder (railroad)

In rail transport, a retarder is a device installed in a classification yard used to reduce the speed of freight cars as they are sorted into trains.

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Reverser handle

A reverser handle is an operating control for a railroad locomotive that is used to determine the direction of travel.

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Reversing gear

On a steam locomotive, the reversing gear is used to control the direction of travel of the locomotive.

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Right-of-way (transportation)

A right-of-way (ROW) is a right to make a way over a piece of land, usually to and from another piece of land.

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Roadrailer

In railroad terminology a Roadrailer or RoadRailer is a highway trailer, or semi-trailer, that is specially equipped for use in railroad intermodal service.

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Rolling stock

The term rolling stock in rail transport industry originally referred to any vehicles that move on a railway.

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Rolling-element bearing

A rolling-element bearing, also known as a rolling bearing, is a bearing which carries a load by placing rolling elements (such as balls or rollers) between two bearing rings called races.

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Rookie

A rookie is a person in the first year of activity in a sport, or someone new to a profession, training, or activity such as a rookie police officer, rookie pilot, a recruit, or occasionally a freshman.

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Roots-type supercharger

The Roots type blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes not unlike a set of stretched gears.

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Rotary snowplow

A rotary snowplow is a piece of railroad snow removal equipment with a large circular set of blades on its front end that rotate to cut through the snow on the track ahead of it.

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Ruling gradient

The term ruling grade is usually used as a synonym for "steepest climb" between two points on a railroad.

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Sand

Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.

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Sandbox (locomotive)

A sandbox is a container on most locomotives, multiple units and trams that holds sand, which is dropped on the rail in front of the driving wheels in wet and slippery conditions and on steep grades to improve traction.

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Sandite

Sandite is a substance used on railways in the UK, Ireland, US, the Netherlands and Belgium to combat leaves on the line,http://www.agrri.org.uk/BRR/docs/TM-TRIB-14%20_A_.pdf which can cause train wheels to slip and become damaged with flat spots.

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Schnabel car

A Schnabel car or Schnabel wagon is a specialized type of railroad freight car.

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Section (rail transport)

In rail transport, a section could refer to: a portion of a train that may be operated independently and/or combined with other sections to operate as a single unit; or a portion of railway line designated for signalling or maintenance; or an interior portion of a sleeping car made up of two double seats during daytime that convert to two double berths during nighttime.

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Shay locomotive

The Shay locomotive was the most widely used geared steam locomotive.

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Shuttle train

The expression shuttle train refers to a train that runs back and forth between two points, especially if it offers a frequent service over a short route.

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Siding (rail)

A siding, in rail terminology, is a low-speed track section distinct from a running line or through route such as a main line or branch line or spur.

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Sight glass

A sight glass or water gauge is a type of level sensor, a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within.

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Signal passed at danger

A signal passed at danger (SPAD) in railway terminology of many countries, including Australia and the UK (where it is also known as either a SPAD or SPAR), occurs when a train passes a stop signal without authority to do so.

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Signalling block system

Signalling block systems enable the safe and efficient operation of railways to avoid collisions between trains.

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Signalling control

On a rail transport system, signalling control is the process by which control is exercised over train movements by way of railway signals and block systems to ensure that trains operate safely, over the correct route and to the proper timetable.

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Signalman (rail)

A signalman or signaller is an employee of a railway transport network who operates the points and signals from a signal box in order to control the movement of trains.

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Simmons-Boardman Publishing

Simmons-Boardman Publishing is an American publisher, specializing in industry publications.

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Sleeping car

The sleeping car or sleeper (often wagon-lit) is a railway passenger car that can accommodate all its passengers in beds of one kind or another, primarily for the purpose of making nighttime travel more restful.

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Slippery rail

Slippery rail or low railhead adhesion, is a condition of railways (railroads) where contamination of the railhead causes trains to experience less adhesion (grip).

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Slow order

A slow order is a local speed restriction on a rail line which is set below the track's normal speed limit.

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Slug (railroad)

A railroad slug is an accessory to a diesel-electric locomotive.

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Smokebox

A smokebox is one of the major basic parts of a steam locomotive exhaust system.

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Snow shed

A snow shed, snow bridge or avalanche gallery is a type of rigid snow-supporting structure for avalanche control (avalanche defense) or to maintain passage in areas where snow removal becomes almost impossible.

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Snowplow

A snowplow (also snow plow, snowplough or snow plough) is a device intended for mounting on a vehicle, used for removing snow and ice from outdoor surfaces, typically those serving transportation purposes.

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Southern Pacific Transportation Company

The Southern Pacific (or Espee from the railroad initials- SP) was an American Class I railroad network that existed from 1865 to 1998 that operated in the Western United States.

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Span bolster

A span bolster, in rail terminology, is a beam or frame used to link two trucks (US) or bogies (UK) so that they can be articulated together and be joined to the locomotive or railroad car at one rotating mounting point.

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Spreader (railroad)

A spreader is a type of maintenance equipment designed to spread or shape ballast profiles.

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Standard-gauge railway

A standard-gauge railway is a railway with a track gauge of.

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Station master

The station master (or stationmaster) is the person in charge of a railway station, particularly in the United Kingdom and many other countries outside North America.

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Steam engine

A steam engine is a heat engine that performs mechanical work using steam as its working fluid.

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Steam generator (railroad)

A steam generator is a type of boiler used to produce steam for climate control and potable water heating in railroad passenger cars.

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Steam locomotive

A steam locomotive is a type of railway locomotive that produces its pulling power through a steam engine.

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Structure gauge

The structure gauge, also called the minimum clearance outline, is the minimum height and width of tunnels and bridges as well as the minimum height and width of the doors that allow a rail siding access into a warehouse.

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Supercharger

A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine.

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Superheated steam

Superheated steam is a steam at a temperature higher than its vaporization (boiling) point at the absolute pressure where the temperature is measured.

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Superheater

A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam.

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Surveying

Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them.

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Switcher

A switcher or shunter (Great Britain: shunter; Australia: shunter or yard pilot; United States: switcher, switch engine, or yard goat, except Pennsylvania Railroad: shifter) is a small railroad locomotive intended not for moving trains over long distances but rather for assembling trains ready for a road locomotive to take over, disassembling a train that has been brought in, and generally moving railroad cars around – a process usually known as ''switching'' (USA) or shunting (UK).

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Switching and terminal railroad

A switching and terminal railroad is a freight railroad company whose primary purpose is to perform local switching services or to own and operate a terminal facility.

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Switchman

A switchman (North America) or pointsman (British Isles) is a rail transport worker whose original job was to operate various railway switches or points on a railroad.

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Tamping machine

A tamping machine or ballast tamper is a machine used to pack (or tamp) the track ballast under railway tracks to make the tracks more durable.

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Tank car

A tank car (International Union of Railways (UIC): tank wagon) is a type of railroad car (UIC: railway car) or rolling stock designed to transport liquid and gaseous commodities.

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Tank locomotive

A tank locomotive or tank engine is a steam locomotive that carries its water in one or more on-board water tanks, instead of a more traditional tender.

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Team track

A team track is a small railroad siding or spur track intended for the use of area merchants, manufacturers, farmers and other small businesses to personally load and unload products and merchandise, usually in smaller quantities.

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Tender (rail)

A tender or coal-car is a special rail vehicle hauled by a steam locomotive containing its fuel (wood, coal, or oil) and water.

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The New York Times

The New York Times (sometimes abbreviated as The NYT or The Times) is an American newspaper based in New York City with worldwide influence and readership.

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The New York Times Company

The New York Times Company is an American media company which publishes its namesake, The New York Times.

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Thermite

Thermite is a pyrotechnic composition of metal powder, which serves as fuel, and metal oxide.

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Third rail

A third rail is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway track.

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Throttle

A throttle is the mechanism by which fluid flow is managed by the constriction or obstruction.

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Through coach

In rail terminology, a through coach is a passenger car (coach) that is re-marshalled during the course of its journey.

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Token (railway signalling)

In railway signalling, a token is a physical object which a train driver is required to have or see before entering onto a particular section of single track.

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Top and tail

A top-and-tail railway train has locomotives at both ends, for ease of changing direction, especially where the terminal station has no run-round loop.

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Track (rail transport)

The track on a railway or railroad, also known as the permanent way, is the structure consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade.

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Track ballast

Track ballast forms the trackbed upon which railroad ties (sleepers) are laid.

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Track bed

The track bed or trackbed is the groundwork onto which a railway track is laid.

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Track circuit

A track circuit is a simple electrical device used to detect the absence of a train on rail tracks, used to inform signallers and control relevant signals.

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Track gauge

In rail transport, track gauge is the spacing of the rails on a railway track and is measured between the inner faces of the load-bearing rails.

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Track transition curve

A track transition curve, or spiral easement, is a mathematically-calculated curve on a section of highway, or railroad track, in which a straight section changes into a curve.

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Traction motor

A traction motor is an electric motor used for propulsion of a vehicle, such as an electric locomotive or electric roadway vehicle.

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Tractive force

As used in mechanical engineering, the term tractive force can either refer to the total traction a vehicle exerts on a surface, or the amount of the total traction that is parallel to the direction of motion.

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Trailing wheel

On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle (wheelset) located behind the driving wheels.

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Train

A train is a form of transport consisting of a series of connected vehicles that generally runs along a rail track to transport cargo or passengers.

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Train dispatcher

A train dispatcher (US), rail traffic controller (Canada), train controller (Australia) or signalman (UK), is employed by a railroad to direct and facilitate the movement of trains over an assigned territory, which is usually part, or all, of a railroad operating division.

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Train event recorder

A train event recorder (also called On-Train Monitoring Recorder or On-Train Data Recorder in the United Kingdom, Event Recorder System, Event Recorder Unit, or simply Event Recorder) is a device that records data about the operation of train controls and performance in response to those controls and other train control systems.

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Train horn

A train horn is a powerful air horn that serves as an audible warning device on electric and Diesel locomotives.

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Train operating company

A train operating company (TOC) is a business operating passenger trains on the railway system of Great Britain under the collective National Rail brand.

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Train order operation

Train order operation, or more accurately timetable and train order operation, is a largely obsolete system by which the railroads of North America conveyed operating instructions before the days of centralized traffic control, direct traffic control, and the use of track warrants conveyed by radio.

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Train station

A train station, railway station, railroad station, or depot (see below) is a railway facility or area where trains regularly stop to load or unload passengers or freight.

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Train wheel

A train wheel or rail wheel is a type of wheel specially designed for use on rail tracks.

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Train whistle

A train whistle or air whistle (originally referred to as a steam trumpet) is an audible signaling device on a steam locomotive, used to warn that the train is approaching, and to communicate with rail workers.

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Trains (magazine)

Trains is a monthly US magazine dedicated to trains and railroads, and is one of the two flagship publications of Kalmbach Publishing.

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Tram

A tram (also tramcar; and in North America streetcar, trolley or trolley car) is a rail vehicle which runs on tramway tracks along public urban streets, and also sometimes on a segregated right of way.

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Tram-train

A tram-train is a light-rail public transport system where trams run through from an urban tramway network to main-line railway lines which are shared with conventional trains.

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Treadle (railway)

In railway signalling, a treadle is a mechanical or electrical device that detects that a train axle has passed a particular location.

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Two-stroke diesel engine

A two-stroke diesel engine is a diesel engine that works in two strokes.

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Underframe

An underframe is a framework of wood or metal carrying the main body structure of a railway vehicle, such as a locomotive, carriage or wagon.

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Union Pacific Railroad

The Union Pacific Railroad (or Union Pacific Railroad Company and simply Union Pacific) is a freight hauling railroad that operates 8,500 locomotives over 32,100 route-miles in 23 states west of Chicago and New Orleans.

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Unit train

A unit train, also called a block train or a trainload service, is a train in which all cars (wagons) carry the same commodity and are shipped from the same origin to the same destination, without being split up or stored en route.

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Utah Transit Authority

The Utah Transit Authority (UTA), officially the Transit District of Utah (TDU) since May 2018, is the provider of public transportation throughout the Wasatch Front of Utah, in the United States, which includes the metropolitan areas of Ogden, Park City, Provo, Salt Lake City and Tooele.

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Vacuum

Vacuum is space devoid of matter.

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Vacuum brake

The vacuum brake is a braking system employed on trains and introduced in the mid-1860s.

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Valve gear

The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle.

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Vehicle

A vehicle (from vehiculum) is a machine that transports people or cargo.

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Water crane

A water crane is a device used for delivering a large volume of water into the tank or tender of a steam locomotive.

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Welding

Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing fusion, which is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal.

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Wheel–rail interface

The wheel–rail interface is the contact area where wheel–rail interaction between wheels and rails in railways takes place.

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Wheeltapper

A wheeltapper is a railway worker employed to check the integrity of train wheels and that axle boxes are not overheating.

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Whistle post

A whistle post (or whistle board), in railroad usage, is a sign marking a location where a locomotive engineer is required to sound the horn or whistle.

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Whyte notation

The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte, and came into use in the early twentieth century following a December 1900 editorial in American Engineer and Railroad Journal.

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Wigwag (railroad)

Wigwag is the nickname given to a type of railroad grade crossing signal once common in North America, named for the pendulum-like motion it used to signal the approach of a train.

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Wrong-side failure

A wrong-side failure describes a failure condition in a piece of railway signalling equipment that results in an unsafe state.

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Yellow

Yellow is the color between orange and green on the spectrum of visible light.

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Zig zag (railway)

A railway zig zag, also called a switchback, is a method of climbing steep gradients with minimal need for tunnels and heavy earthworks.

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2-10-0

Under the Whyte notation for the classification of steam locomotives, 2-10-0 represents the wheel arrangement of two leading wheels on one axle, ten powered and coupled driving wheels on five axles, and no trailing wheels.

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2-10-2

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels, ten powered and coupled driving wheels, and two trailing wheels.

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2-10-4

Under the Whyte notation for the classification of steam locomotives, a locomotive has two leading wheels on one axle, usually in a bissel truck, ten coupled driving wheels on five axles, and four trailing wheels on two axles, usually in a bogie.

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2-6-0

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, six powered and coupled driving wheels on three axles and no trailing wheels.

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2-6-2

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels, six coupled driving wheels and two trailing wheels.

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2-8-0

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, eight powered and coupled driving wheels on four axles and no trailing wheels.

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2-8-2

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, eight powered and coupled driving wheels on four axles and two trailing wheels on one axle, usually in a trailing truck.

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2-8-4

Under the Whyte notation, a 2-8-4 is a steam locomotive that has one unpowered leading axle, usually in a leading truck, followed by four powered and coupled driving axles, and two unpowered trailing axles, usually mounted in a bogie.

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4-4-0

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, represents the arrangement of four leading wheels on two axles, usually in a leading bogie, four powered and coupled driving wheels on two axles, and no trailing wheels.

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4-4-2 (locomotive)

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, represents a configuration of four leading wheels on two axles, usually in a leading bogie with a single pivot point, four powered and coupled driving wheels on two axles, and two trailing wheels on one axle, usually in a trailing truck which supports part of the weight of the boiler and firebox and gives the class its main improvement over the configuration.

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4-4-4

Under the Whyte notation for the classification of steam locomotives, 4-4-4 represents the wheel arrangement of four leading wheels on two axles, four powered and coupled driving wheels on two axles, and four trailing wheels on two axles.

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4-6-2

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle.

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4-6-4

Under the Whyte notation for the classification of locomotives, represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels.

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4-6-6-4

In Whyte notation, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of six driving wheels and four trailing wheels.

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4-8-2

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels, eight powered and coupled driving wheels and two trailing wheels.

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4-8-4

Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles, eight powered and coupled driving wheels on four axles and four trailing wheels on two axles.

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References

[1] https://en.wikipedia.org/wiki/Glossary_of_rail_transport_terms

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