The Pan-American Highway is a Goliath of roads in the Pantheon of world famous highways. The Guinness Book of Records calls it the world’s longest “motorable road”. The Pan-American Highway’s fame is such as to earn it the sobriquet of “Mother of all road trips”. This road running north/south spanning the two hemispheres of the continental Americas, stretches approximately 30,000 km from Prodhoe Bay in Alaska to its extremity at Ushuaia (Argentina) on the tip of Tierra del Fuego①. And yet its much more than a singular, linear road, it is a network of many (in some cases loosely linked) roads.

Nomenclature: although the network of roads that comprises Americas’ iconic highway is known generically as the Pan-American Highway (PAH), particular sections in different countries have their own local designations for the roadway. In Alaska it starts off as the Dalton Highway and extends south as the Alaskan Highway. When the PAH crosses the 49th Parallel you won’t find many signposts saying it but the whole US interstate highway system is designated as the “Pan-American Highway”②. In México and Central America it goes by the moniker “Inter-American Highway” (Carretera Interamericana), as well as by local network names, Federal Highway 45/190, etc. In the South American countries locals use the generic La Panamericana while the Highway is also identified by its domestic descriptor, eg, Columbia: Route 55/66, Peru: Peru Highway 1, Chile: Ruta 5, Argentina: National Route 3/7. As a general rule of thumb, according to UCF assistant professor Eric Rutkow, “the Pan-American Highway is just Highway 1 or 2 of the national system in most of South America” The Longest Line on the Map: The United States, the Pan-American Highway, and the Quest to Link the Americas .

𝐼𝓃𝓉𝑒𝓇𝓈𝓉𝒶𝓉𝑒 𝟤𝟧, 𝒩𝑒𝓌 𝑀𝑒𝓍𝒾𝒸𝑜, 𝑜𝓃𝑒 𝑜𝒻 𝓉𝒽𝑒 𝓊𝓃𝑜𝒻𝒻𝒾𝒸𝒾𝒶𝓁 𝒷𝓇𝒶𝓃𝒸𝒽𝑒𝓈 𝑜𝒻 𝒫𝒜𝐻

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Unofficial routes
If you look at a map of the Pan-American Highway, one of the first things that stands out is that there is no one route for much of its journey. At Edmonton, Canada, the PAH forks, giving travellers the choice of an eastern route to the US via Winnipeg, bisecting America and entering México via Texas, or following the straighter route south through the Rocky Mountain states to Mexico. In South America also there are various spurs branching off from the PAH, eg, from Bogotá, Columbia to Venezuela; from Montevideo, Uruguay, up the Brazilian coast as far as São Paulo and Rio. When the PAH reaches the Chilean port of Valparaiso, it turns east and joins with Buenos Aires, from where it runs parallel to the Atlantic down through Argentine Patagonia.

𝑅𝑒𝒹𝑒𝑒𝓂𝑒𝓇 𝒯𝓊𝓃𝓃𝑒𝓁 (𝐼𝓂𝒶𝑔𝑒: 𝒲𝒾𝓀𝒾𝓂𝒶𝓅𝒾𝒶)

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Loftiest points of the PAH
The PAH winds its way through wide diversities of terrain, including many mountainous regions, which prove to be some of the most challenging parts for motorists. The highest points reached by the PAH are in Costa Rica where it rises to a height of 3,335 metres (the so-called “Summit of Death“), in Quito, Eduador’s capital, where the PAH climbs to 2,850 metres, and at the Christ the Redeemer Tunnel, a mountain pass in the Andes (linking Santiago, Chile, to Mendoza, Argentina), 3,200 metres.

Bifurcated highway
Just as the Great Wall of China took millennias to construct, the PAH was far from a rapid build, rather it evolved slowly and haltingly, stage by stage. Laredo/Nuevo Laredo (US/Méxican border) to Mexico City was the first stage completed, followed later by sections connecting Mexico to Panama and Columbia to Argentina. Also like the Great Wall, PAH remains unfinished, the Highway in its “nether regions” is not contiguous. The missing piece in the jigsaw of the road’s infrastructure is a 60-70–mile long “no man’s land” linking the southern part of Panama to the top of Columbia. It’s Spanish name is Tapón del Darién (lit. “Darién Plug”) but is better known as the Darién Gap, a narrow strip of inhospitable terrain, the severity of which has defied all attempts to construct a road through it. The saga of the Darién Gap—the “Achilles Heel” of the Americas’ super-highway—will be taken up in Part 2 of this blog, along with the US’s historic driving (pun intended) role in the development of the PAH.

𝒮𝑜𝓊𝓇𝒸𝑒: 𝓇𝑒𝓈𝑒𝒶𝓇𝒸𝒽𝑔𝒶𝓉𝑒.𝓃𝑒𝓉

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① traversing 14 countries
② though Interstate 25 at Albuquerque, New Mexico, is signposted the ”Pan-American Freeway”