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[[File:Pictograms-nps-misc-trucks-2.svg|thumb|symbols of trucks]]

[[File:Pictograms-nps-misc-trucks-2.svg|thumb|symbols of trucks]]

A '''truck''' (or '''lorry''' in [[British English]]) is a motor [[vehicle]] used to [[transport]] [[Product (consumer goods)|goods]], [[material]]s, or troops. The word "truck" comes from the [[Greek language|Greek]] word "''trochos''", which means "wheel".  Most trucks use diesel fuel. Trucks have [[variation]]s in size, power, and configuration, with the smallest being mechanically similar to an [[automobile]] (coachwork types: [[coupe]], [[convertible]], [[fastback]], [[hatchback]], [[limousine]], [[Sedan (automobile)|sedan car]], [[station wagon]], [[minivan]], [[van]], and [[pickup truck]]). Also, the road spreads the weight of the truck which means larger amounts can be carried than with [[train]]s and [[railroad track]]s.

A '''truck''' (or '''lorry''' in [[British English]]) is a motor [[vehicle]] used to [[transport]] [[Product (consumer goods)|goods]], [[material]]s, or troops. The word "truck" comes from the [[Greek language|Greek]] word "''trochos''", which means "wheel".  Most trucks use diesel fuel. Trucks have [[variation]]s in size, power, and configuration, with the smallest being mechanically similar to an [[automobile]]. Also, the road spreads the weight of the truck which means larger amounts can be carried than with [[train]]s (steam-powered, diesel-powered, or light rail) on [[railroad track]]s.

[[File:Freightliner_M2_106_6x4_2014_(14240376744).jpg|thumb|upright=1.35|[[Freightliner Trucks|Freightliner]] M2 dump truck.]]

[[File:Freightliner_M2_106_6x4_2014_(14240376744).jpg|thumb|upright=1.35|[[Freightliner Trucks|Freightliner]] M2 dump truck.]]

== Sizes of trucks ==

== Sizes of trucks ==

== Light trucks ==

== Light trucks ==

''Light trucks'' are trucks the size of cars. They are used by [[individual]]s and also companies. In the [[United States]], a truck is a light truck if it weighs less than 6,300 [[Kilogram|kg]] (13,000 [[Pound (mass)|lb]]). Light trucks are only a little heavier than [[van]]s or [[pickup truck]]s, but require a special [[driver's license]].

''Light trucks'' are trucks the size of cars. They are used by [[individual]]s and also companies. In the [[United States]], a truck is a light truck if it weighs less than 6,300 [[Kilogram|kg]] (13,000 [[Pound (mass)|lb]]). Light trucks are only a little heavier than [[van]]s, [[minivan]]s, [[SUV]]s or [[pickup truck]]s, but require a special [[driver's license]].

== Medium trucks ==

== Medium trucks ==

''Medium trucks'' are heavier than light trucks but lighter than heavy trucks. In the United States, a truck is a medium truck if it weighs between 6,300 kg (13,000 lb) and 15,000 kg (33,000 lb). Trucks that are used for local [[delivery]] and [[public service]] (dump trucks, [[garbage]] trucks) are normally around this size than a [[car]] (coachwork types: [[coupe]], [[convertible]], [[fastback]], [[hatchback]], [[limousine]], [[Sedan (automobile)|sedan car]], [[station wagon]], [[minivan]], [[van]], and [[pickup truck]]) or [[bus]] (all types: [[Coach bus]], [[Offroad bus]], [[Training bus]], [[Gyrobus]], [[High-floor bus]], [[Bi-articulated bus]], [[Police bus]], [[Guided bus]], [[Hybrid bus]], [[Type A School bus]], [[Type B School bus]], [[Type C School bus]], [[Type D School bus]], [[Shuttle bus]], [[Neighborhood bus]], [[Single-decker bus]], [[Articulated bus]], [[Minibus]], [[Minicoach]], [[Double-decker bus]], [[Single-decker bus]], and [[Low-floor bus]]). Medium trucks have usually two [[axles]]: one at front and one at rear. The rear wheels may be coupled (that is: two wheels hitched together) to enable heavier load, but they may also be single.

''Medium trucks'' are heavier than light trucks but lighter than heavy trucks. In the United States, a truck is a medium truck if it weighs between 6,300 kg (13,000 lb) and 15,000 kg (33,000 lb). Trucks that are used for local [[delivery]] and [[public service]] (dump trucks, [[garbage]] trucks) are normally around this size than a [[car]] or [[bus]]. Medium trucks have usually two [[axles]]: one at front and one at rear. The rear wheels may be coupled (that is: two wheels hitched together) to enable heavier load, but they may also be single, In the US, they are defined as weighing between 14001–26000 lb (6351–11793 kg). In global markets, a medium-duty truck is larger than a heavy-duty pickup truck or full-size van.

== Heavy trucks ==

== Heavy trucks ==

''Heavy trucks'' are the heaviest trucks that are allowed on the road. In the U.K. they are known as ''lorries''. Usually heavy trucks have three [[axle]]s: one at front and two at rear, and the rear axles have coupled wheels to enable heavy loads than a [[car]] (coachwork types: [[coupe]], [[convertible]], [[fastback]], [[hatchback]], [[limousine]], [[Sedan (automobile)|sedan car]], [[station wagon]], [[minivan]], [[van]], and [[pickup truck]]) or [[bus]] (all types: [[Coach bus]], [[Offroad bus]], [[Training bus]], [[Gyrobus]], [[High-floor bus]], [[Bi-articulated bus]], [[Police bus]], [[Guided bus]], [[Hybrid bus]], [[Type A School bus]], [[Type B School bus]], [[Type C School bus]], [[Type D School bus]], [[Shuttle bus]], [[Neighborhood bus]], [[Single-decker bus]], [[Articulated bus]], [[Minibus]], [[Minicoach]], [[Double-decker bus]], [[Single-decker bus]], and [[Low-floor bus]]). Often heavy trucks pull trailers. They can be either ''full trailers'' which have both front and rear axles or boggies and their own brakes, and are connected to the towing truck with a towbar, or ''semi-trailers'', which are attached to a special kind of a truck called ''tractor unit'' with a turntable coupling ("fifth wheel"). A semi-trailer is a kind of [[Trailer (vehicle)|trailer]] which has wheels only in the back and the front rides on the back of the tractor unit. The tractor unit has an [[engine]] and the semi-trailer does not. Driving a heavy truck requires a professional [[driver's license]]. Truck drivers are called ''truckers''.

''Heavy trucks'' are the heaviest trucks that are allowed on the road. In the U.K. they are known as ''lorries''. Usually heavy trucks have three [[axle]]s: one at front and two at rear, and the rear axles have coupled wheels to enable heavy loads than a [[car]] or [[bus]]. Often heavy trucks pull trailers. They can be either ''full trailers'' which have both front and rear axles or boggies and their own brakes, and are connected to the towing truck with a towbar, or ''semi-trailers'', which are attached to a special kind of a truck called ''tractor unit'' with a turntable coupling ("fifth wheel"). A semi-trailer is a kind of [[Trailer (vehicle)|trailer]] which has wheels only in the back and the front rides on the back of the tractor unit. The tractor unit has an [[engine]] and the semi-trailer does not. Driving a heavy truck requires a professional [[driver's license]]. Truck drivers are called ''truckers''.

The laws of various countries say what kind of vehicle combinations are allowed. A semi-trailer can be converted into a full trailer with using a ''dolly''. A dolly is a small trailer which has only a [[bogie]] (= set of wheels), fifth wheel coupling for the semi-trailer and a towbar. Using a dolly, the semi-trailer can now be hitched to an ordinary cargo-carrying truck and does not need a tractor unit.

The laws of various countries say what kind of vehicle combinations are allowed. A semi-trailer can be converted into a full trailer with using a ''dolly''. A dolly is a small trailer which has only a [[bogie]] (= set of wheels), fifth wheel coupling for the semi-trailer and a towbar. Using a dolly, the semi-trailer can now be hitched to an ordinary cargo-carrying truck and does not need a tractor unit.

'''Boom Truck'''  is a truck with a hydraulic arm. The hydraulic arm on a boom truck is called the boom. This boom will reach out past the end of the vehicle, and it will grab the vehicles that need to be towed. The boom of the truck remains in a fixed position, which allows it to be a very stable option when it comes to towing.

'''Boom Truck'''  is a truck with a hydraulic arm. The hydraulic arm on a boom truck is called the boom. This boom will reach out past the end of the vehicle, and it will grab the vehicles that need to be towed. The boom of the truck remains in a fixed position, which allows it to be a very stable option when it comes to towing.

'''Wreckers''' ("recovery lorries" in the UK and sometimes "tow trucks" in the US) are used to lift and tow broken cars and trucks. They usually have a [[Crane (machine)|boom]] with a [[Wire rope|cable]]. Cars are often carried on special flatbeds.

'''Wreckers''' ("recovery lorries" in the UK and sometimes "tow trucks" in the US) are used to lift and tow broken cars and trucks as large as a semi-trailer truck. They usually have a [[Crane (machine)|boom]] with a [[Wire rope|cable]]. Cars are often carried on special flatbeds.

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File:International Durastar 4400 crop.jpg|Box truck

File:International Durastar 4400 crop.jpg|Box truck