The Pan-American Highway is a network of road

Road

A road is a thoroughfare, route, or way on land between two places, which typically has been paved or otherwise improved to allow travel by some conveyance, including a horse, cart, or motor vehicle. Roads consist of one, or sometimes two, roadways each with one or more lanes and also any...

s measuring about 47958 kilometres (29,799.8 mi) in total length. Except for an 87 kilometres (54.1 mi) rainforest break, called the Darién Gap

Darién Gap

The Darién Gap is a large swath of undeveloped swampland and forest separating Panama's Darién Province in Central America from Colombia in South America. It measures just over long and about wide. Roadbuilding through this area is expensive, and the environmental toll is steep. Political...

, the road links the mainland nations of the Americas

Americas

The Americas, or America , are lands in the Western hemisphere, also known as the New World. In English, the plural form the Americas is often used to refer to the landmasses of North America and South America with their associated islands and regions, while the singular form America is primarily...

 in a connected highway system. According to Guinness World Records

Guinness World Records

Guinness World Records, known until 2000 as The Guinness Book of Records , is a reference book published annually, containing a collection of world records, both human achievements and the extremes of the natural world...

, the Pan-American Highway is the world's longest "motorable road". However, because of the Darién Gap, it is not possible to cross between South America and Central America by traditional motor vehicle.

The Pan-American Highway system is mostly complete and extends from Prudhoe Bay, Alaska

Prudhoe Bay, Alaska

Prudhoe Bay or Sagavanirktok is a census-designated place located in North Slope Borough in the U.S. state of Alaska. As of the 2010 census, the population of the CDP was 2,174 people; however, at any given time several thousand transient workers support the Prudhoe Bay oil field...

, 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...

 to the lower reaches of South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

.