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Rail transport is a means of transferring passengers and goods on wheeled vehicles running on rails, which are located on tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tired road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway electrification system or produce their own power, usually by diesel engines or, historically, steam engines. Most tracks are accompanied by a signalling system. Railways are a safe land transport system when compared to other forms of transport. [a] Railway transport is capable of high levels of passenger and cargo utilisation and energy efficiency, but is often less flexible and more capital-intensive than road transport, when lower traffic levels are considered.
The Caribbean is a region of the Americas that comprises the Caribbean Sea, its surrounding coasts, and its islands (some of which lie within the Caribbean Sea and some of which lie on the edge of the Caribbean Sea where it borders the North Atlantic Ocean). The region lies southeast of the Gulf of Mexico and of the North American mainland, east of Central America, and north of South America. The region, situated largely on the Caribbean Plate, has more than 700 islands, islets, reefs and cays (see the list of Caribbean islands). Countries in Caribbean are Antigua, Barbuda, The Bahamas, Barbados, Belize, Dominica, Grenada, Guyana, Haiti, Jamaica, Montserrat, Saint Kitts, Nevis, Saint Lucia, Saint Vincent, the Grenadines, Suriname, Trinidad and Tobago.