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The Pan-American Highway (Portuguese: Rodovia / Auto-estrada Pan-americana, Spanish: Autopista / Carretera / Ruta Panamericana) is a network of roads measuring about 48,000 kilometres (30,000 mi) in total length, except for a rainforest break of approximately 100 km (60 mi), called the Darién Gap, the road links almost all of the mainland nations of the Americas in a connected highway system. According to Guinness World Records, 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 passes through many diverse climates and ecological types, from dense jungles, to arid deserts, to cold mountain passes. Since the highway passes through many countries, it is far from uniform. Some stretches of the highway are passable only during the dry season, and in many regions driving is occasionally hazardous.
Jake Silverstein, writing in 2006, described the Pan-American Highway as "a system so vast, so incomplete, and so incomprehensible it is not so much a road as it is the idea of Pan-Americanism itself".
The concept of a route from one tip of the Americas to the other was originally proposed at the First Pan-American Conference in 1889 as a railroad; however, nothing ever came of this proposal. The idea of the Pan-American Highway emerged at the Fifth International Conference of American States in 1923, where it was originally conceived as a single route. On 29 July 1937, Bolivia, Chile, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, and the United States signed the Convention on the Pan-American Highway, whereby they agreed to begin construction. The first Pan-American highway conference convened October 5, 1925 in Buenos Aires. Mexico was the first Latin American country to complete its portion of the highway, in 1950.
The Northern Pan-American Highway travels through 9 countries:
The Southern Pan-American Highway travels through 9 countries:
The Pan-American Highway system is physically mostly complete and extends in de-facto terms from Prudhoe Bay, Alaska, in North America to the lower reaches of South America. Several southern highway termini are claimed to exist, including the cities of Puerto Montt and Quellón in Chile and Ushuaia in Argentina. West and north of the Darien Gap, it is also known as the Inter-American Highway through Central America and Mexico where it splits into several spurs leading to the American border.
The entire Interstate Highway System in the United States has been officially designated part of the Pan American system by the Federal Highway Administration. Of the many freeways that make up this very comprehensive system, there are several that stand out because of their mainly north-south orientation and their links to the main Mexican route and its spurs. These include the following:
In Canada, no particular road has been officially or unofficially designated as the Pan-American Highway (the Trans-Canada Highway, which runs mostly east-west, is the country's only official interprovincial highway system). However, some unofficial claims have been made based on routes that are a natural extension of several key American highways that reach the Canadian border. However, British Columbia Highway 97 and Highway 2 from that province to Alberta both pick up where the southern end of the Alaska highway leaves off. Highway 97 becomes US Highway 97 at the American border and eventually ends at Interstate Highways 5 in northern California. British Columbia Highway 99 provides an alternate route from highway 97 just north of Cache Creek that runs through Whistler and Vancouver before ending at the U.S. border at the north end of Interstate 5 in Washington State, the beginning of the official Pan-American route south of British Columbia. Meanwhile, Alberta Highway 2 runs south and east to Alberta Highway 3 leading into Lethbridge, then south on Alberta Highway 4 to the American border where it becomes Interstate 15 in Montana, the first official stretch of the Pan-American Highway south of the Alberta route. Interstate 15 runs south all the way to San Diego where it converges with Interstate 5 then heads east as Interstate 8. This links indirectly via a short stretch of Interstate 10 to Interstate 19 that becomes a spur of the Pan-American highway through Mexico at the Nogales border crossing.
In 1966, the Federal Highway Administration designated the entire Interstate Highway System part of the Pan-American Highway System. However comprehensive this designation, there are certain interstates and other smaller highways that attract particular attention because of special names that have been officially or unofficially attached or identity claims that have been made.
When the section of Interstate 35 in San Antonio, Texas was built, it was named the Pan Am Expressway.. The whole of I-35 is a northerly continuation of highway 85, the original official Mexican route, to the Canadian border just south of Thunder Bay, Ontario. This has led to an unofficial claim of the Trans-Canada Highway from Thunder Bay to Alberta, Canada as a de-facto part of the Pan-American system.
Interstate 25 in Albuquerque, New Mexico was named the Pan-American Freeway,:248 as an extension of highway 45, the Mexican spur linking El Paso to the original route along highway 85 north of Mexico City. This portion of I-25 largely follows the historic Camino Real, and thus serves a culturally significant portion of the Pan American system. Like I-35, the complete route of Interstate 25 is an official northerly continuation towards Alberta, where provincial highway 2 provides a clear but unofficial path to the Alaska Highway.
The Pan American Highway Association claims U.S. Route 81 from its main point of separation from I35 south of McPherson, Kansas to Watertown, South Dakota where it merges with I29 running north to the Canadian border south of Winnipeg. There it links with the Thunder Bay-Alberta section of the Trans-Canada. Unlike the interstate highways through San Antonio and Albuquerque, the claim for Highway 81 remains unofficial.
Beyond Alberta, the Alaska Highway through Alaska, the Yukon and northern British Columbia is also claimed as a de-facto part of the Pan-American Highway, as well as the Dalton Highway in Alaska, which is the only year-round road in North America to reach the Arctic Ocean (the ice road from Inuvik, Canada also reaches the Arctic Ocean but is not claimed as part of the Pan-American system)
Several intra-North American routes have names that make no direct reference to the Pan-American Highway. U.S. Route 85 is designated the CanAm Highway. It follows Interstate 25 from El Paso to Denver, Colorado, then separates from the interstate and leads to the Canadian province of Saskatchewan, where it follows parts of provincial highways 35, 39, 6, 3, and 2 in succession before terminating at La Ronge. This route was first proposed during the 1920s but was never properly promoted nor developed. A section of the CanAM in Southern Saskatchewan has regressed to the point where it is no longer a paved highway. The CANAMEX Corridor is also similarly designated through the western United States from Arizona north to Montana, and continuing to highway 2 in the Canadian province of Alberta. Finally, Interstate 69 from the Canadian Border at Port Huron, Michigan to Indianapolis, Indiana, and its partly built extension southward, has been dubbed the NAFTA Superhighway along with Ontario Highway 402 in Canada. It will have a spur linking to the original Pan-American route through Mexico to Laredo, Texas, and additional branches extending to the Mexican spurs that cross the border at McAllen, Texas, and Brownsville, Texas. When completed, I-69 will become another official route of the Pan American highway, this time connecting the Mexican routes with the Windsor-Quebec City Corridor in Canada. However, the Canadian extension will have no official status unless so proclaimed by the provincial governments of Ontario and Quebec.
The official route of the Pan-American Highway through Mexico (where it is known as the Inter-American Highway) starts at Nuevo Laredo, Tamaulipas (opposite Laredo, Texas) and goes south to Mexico City along Mexican Federal Highway 85. Later branches were built to the border as follows:
The Pan-American (or Inter-American) highway passes through the Central American countries with the highway designation of CA-1 (Central American Highway 1). In Guatemala, it passes through 10 departments, including Guatemala, where it passes through Guatemala City. In El Salvador, it passes through the cities of Santa Ana, Santa Tecla, Antiguo Cuscatlan, San Salvador, San Martin, San Miguel, and crosses the border into Honduras at Amatillo. From Honduras, it passes into Nicaragua, passing though the Nicaraguan cities of Chinandega, León, and Managua, before entering Costa Rica at Peñas Blancas. In Costa Rica, it passes through Liberia, San José, Cartago, Pérez Zeledón, Palmares, Neily, before crossing into Panama at Paso Canoas. In Panama, it crosses the Panama Canal, and ends at Yaviza, Panama at the edge of the Darién Gap. The road had formerly ended at Cañita, Panama, 110 miles (180 km) north of its current end. United States government funding was particularly significant to complete a high-level bridge over the Panama Canal, during the years when the canal was administered by the United States.
Belize was supposedly included in the route at one time, as they switched which side of the road they drive on. As British Honduras, they were the only Central American country to drive on the left side of the road.
The Pan-American Highway is interrupted between Panama and Colombia by a 100 km (60 mi) stretch of marshland known as the Darién Gap. On the South American side, the highway terminates at Turbo, Colombia, while on the Panamanian side, the road terminus is the town of Yaviza.
Efforts have been made for decades to eliminate this gap in the Pan-American highway, but have been controversial. Planning began in 1971 with the help of United States funding, but this was halted in 1974 after concerns raised by environmentalists. Another effort to build the road began in 1992, but by 1994 a United Nations agency reported that the road, and the subsequent development, would cause extensive environmental damage. There is evidence that the Darién Gap has prevented the spread of diseased cattle into Central and Northern America, which have not seen foot-and-mouth disease since 1954, and since at least the 1970s this has been a substantial factor in preventing a road link through the Darién Gap. The Embera-Wounaan and Kuna have also expressed concern that the road would bring about the potential erosion of their cultures.
One proposed option to bridge the gap is a short ferry link from Colombia to a new ferry port in Panama, with an extension of the existing Panama highway that would complete the highway without violating these environmental concerns.
The southern part of the highway begins in northwestern Colombia, from where it follows Colombia Highway 62 to Medellín. At Medellín, Colombia Highway 54 leads to Bogotá, but Colombia Highway 25 turns south for a more direct route. Colombia Highway 72 is routed southwest from Bogotá to join Highway 25 at Murillo. Highway 25 continues all the way to the border with Ecuador.
Another route, known as the Simón Bolívar Highway, runs from Bogotá (Colombia) to Guiria (Venezuela). It begins by using Colombia Highway 71 all the way to the border with Venezuela. From there it uses Venezuela Highway 1 to Caracas and Venezuela Highway 9 to its end at Guiria.
In Chile, the highway follows Chile Highway 5 south to a point north of Santiago (Llaillay), where the highway splits into two parts, one of which goes through Chilean territory to Quellón on Chiloé Island, after which it continues as the Carretera Austral. The other part goes east along Chile Highway 60, which becomes Argentina National Route 7 at the Argentinian border and continues to Buenos Aires, the end of the main highway. The highway network also continues south of Buenos Aires along Argentina National Route 3 towards the city of Ushuaia in Tierra del Fuego. Another branch, from Buenos Aires to Asunción in Paraguay, heads out of Buenos Aires on Argentina National Route 9. It switches to Argentina National Route 11 at Rosario, which crosses the border with Paraguay right at Asunción. Other branches probably exist across the center of South America.
A continuation of the Pan-American Highway to the Brazilian cities of São Paulo and Rio de Janeiro uses a ferry from Buenos Aires to Colonia in Uruguay and Uruguay Highway 1 to Montevideo. Uruguay Highway 9 and Brazil Highway 471 route to near Pelotas, from where Brazil Highway 116 leads to Brazilian main cities.
The highway does not have official segments to Belize, Guyana, Suriname and French Guiana, nor to any of the island nations in the Americas. However, highways from Venezuela link to Brazilian Trans-Amazonian highway that provide a southwest entrance to Guyana, route to the coast, and follow a coastal route through Suriname to French Guiana.
Plans have been discussed for including the West Indies in the Pan American Highway system. According to these, a system of ferries would be established to connect terminal points of the highway. Travelers would then be able to ferry from Key West to Havana, drive to the eastern tip of Cuba, ferry to Haiti, drive through Haiti and the Dominican Republic, and ferry again to Puerto Rico. Included in this system would also be a ferry from the western tip of Cuba to the Yucatán Peninsula. Mexico has already surveyed a route which will run across the Yucatán, Campeche, and Chiapas to San Cristobal de Las Casas, on the Pan American Highway. ("The Pan American Highway System" by Travel Division Pan American Union, Washington D.C. October 1947)
The Pan-American highway is the subject of a 2006 conceptual art piece, The School of Panamerican Unrest, where Mexican-born artist Pablo Helguera is attempting to drive a portable schoolhouse for the length of the entire route.
The travel writer Tim Cahill wrote a book, Road Fever, about his record-setting 24-day drive from Ushuaia in the Argentine province of Tierra del Fuego to Prudhoe Bay in the U.S. state of Alaska with professional long-distance driver Garry Sowerby, much of their route following the Pan-American Highway.
In the British motoring show Top Gear, the presenters drove on a section of the road in their off-road vehicles in the Bolivian Special.
The northern end of the Pan-American Highway at Deadhorse, Alaska
Car on Pan-American Highway. Shown in front of Torres del Paine, Patagonia, Chile.
Pan-American Highway in El Salvador between Lourdes and Santa Ana; this flat 1.5 km wide straight section can be used as an airstrip and it was used during El Salvador Civil War.
Panamericana in the Atacama Desert northern Chile