A trailer is generally an unpowered vehicle pulled by a powered vehicle. Commonly, the term trailer refers to such vehicles used for transport of goods and materials.
Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities, where people can camp or stay have been referred to as trailers. In earlier days, many such vehicles were towable trailers.
In the United States, the term is sometimes used interchangeably with travel trailer and mobile home, varieties of trailers and manufactured housing designed for human habitation. Their origins lay in utility trailers built in a similar fashion to horse-drawn wagons. A trailer park is an area where mobile homes are placed for habitation.
In the United States trailers ranging in size from single-axle dollies to 6-axle, 13 ft 6 in (4,115 mm) high, 53 ft 0 in (16,154 mm) long semi-trailers are commonplace. The latter, when towed as part of a tractor-trailer or "18-wheeler", carries a large percentage of the freight that travels over land in North America.
A trailer may refer to:
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A vehicle (from Latin: vehiculum) is a mobile machine that is designed or used to transport people or cargo. Most often vehicles are manufactured, such as bicycles, cars, motorcycles, trains, ships, boats and aircraft.
Vehicles that do not travel on land often are called craft, such as watercraft, sailcraft, aircraft, hovercraft and spacecraft.
Land vehicles are classified broadly by what is used to apply steering and drive forces against the ground: wheeled, tracked, railed or skied. ISO 3833- 1977 is the standard, also internationally used in legislation, for road vehicles types, terms and definitions.
There are over 1 billion bicycles in use worldwide. According to 2002 estimates, there are around 590 million cars in service in the world and 205 million motorcycles. The most popular vehicle model in history is the Chinese Flying Pigeon bicycle, with on the order of 500 million in service. The most popular motor vehicle is the Honda Super Cub motorcycle, having passed 60 million units in 2008. The top selling car in history is the Toyota Corolla, with at least 35 million produced.