The cab of a truck

Truck

A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile...

 is an enclosed space in a truck where the driver is seated. The word originated as a short form of cabriolet, not cabin. Some may refer to the tractor unit

Tractor unit

A tractor unit, prime mover , road tractor, or traction unit is a heavy-duty commercial vehicle within the large goods vehicle category, usually with a large displacement diesel engine, and several axles. The tractor unit serves as a method of moving trailers...

 of a semi-trailer truck as a cab, but this is not the subject of this article. Modern long-haul trucks cabs usually feature air conditioning

Air conditioning

An air conditioner is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The cooling is done using a simple refrigeration cycle...

, a good sound system

Car audio

Car audio/video , auto radio, mobile audio, 12-volt and other terms are used to describe the sound or video system fitted in an automobile. While 12-volt audio and video systems are also used, marketed, or manufactured for marine, aviation, and buses, this article focuses on cars as the most common...

, and ergonomic seats (often air-suspended).

A sleeper (or sleeper berth

Berth (sleeping)

The word berth was originally used to describe beds and sleeping accommodation on boats and ships and has now been extended to refer to similar facilities on trains, aircraft and buses.-Beds in boats or ships:...

 or bunk) is a compartment attached to the cab where the driver can rest while not driving, sometimes seen in semi-trailer truck

Semi-trailer truck

A semi-trailer truck, also known as a semi, tractor-trailer, or articulated truck or articulated lorry, is an articulated vehicle consisting of a towing engine , and a semi-trailer A semi-trailer truck, also known as a semi, tractor-trailer, or (in the United Kingdom and Ireland) articulated truck...

s. They can range from a simple 2 to 4 foot (0.6 to 1.2 m) bunk to a 12 foot (3.7 m) apartment-on-wheels.
There are a few possible cab configurations:

• Cab over
  Cab over
  Cab-over, also known as COE , cab forward, or forward control, is a body style of truck or van that has a vertical front or "flat face", with the cab of the truck sitting above the front axle...
  
   engine (COE) or flat nose, where the driver is seated on top of the front axle and the engine. The front doors are typically in front of and above the front tires. This design is almost ubiquitous in Europe
  Europe
  Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
  
  , where overall truck lengths are strictly regulated. They were common in the United States, but lost prominence when permitted length was extended in the early 1980s. To access the engine, the whole cab tilts forward, earning this design the name of tilt-cab. This type of cab is especially suited to the delivery conditions in Europe where many roads follow the layout of much more ancient path and trackways which require the additional turning capability of the cab over engine type. The operating conditions of these vehicles tend to be cooler than the conventional cab design and so the decreased engine surface area used for cooling in hotter climates is not required.

Access to a COE cab is commonly by steps forward of the front tires.

• Conventional cabs are the most common in North America
  North America
  North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
  
   and Australia
  Australia
  Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
  
  . The driver is seated behind the engine, as in most passenger cars or pickup trucks. Conventionals are further divided into large car and aerodynamic designs. A "large car" or "long nose" is a conventional truck with a long (6 to 8 foot (1.8 to 2.4 m) or more) hood. With their very square shapes, these trucks experience a lot of wind resistance and typically consume more fuel. They also provide somewhat poorer visibility than their aerodynamic or COE counterparts. By contrast, Aerodynamic cabs are very streamlined, with a sloped hood and other features to lower drag. The front doors are in back of (and mostly above) the front tires.

Access to a conventional cabin is commonly by steps at or near the fuel tank(s) in back of the front tires.

• Cab beside engine designs also exist, but are rather rare.
• Slang terms
  • Tiltin' Hilton or flying coffin - Cab-over with a sleeper berth.
  • Anteater - Specifically refers to the Kenworth T600
    Kenworth T600
    The Kenworth T600 was an aerodynamic semi truck.The T600 was a radical shift in truck design compared to its cousin the W900...
    
    , an aerodynamically-designed tractor whose nose resembles an anteater
    Anteater
    Anteaters, also known as antbear, are the four mammal species of the suborder Vermilingua commonly known for eating ants and termites. Together with the sloths, they compose the order Pilosa...
    
    .
  • Large car - A conventional cab with a large square hood, such as the Peterbilt 379
    Peterbilt 379
    The 379 was Peterbilt's flagship truck from 1987 until the 2007 model year maintaining the nameplate's signature long-nose styling coupled with a rugged edged yet refined profile...
    
     or the Kenworth W900
    Kenworth W900
    The W900 is a Kenworth class 8 truck model, known for its long-nose style.The engine sizes for the W900 range from 9 liters to 15 liters, and it accommodates up to a 600-horsepower engine...
    
    .