Which highway connects the Americas from Alaska to Argentina?

The Pan-American Highway is the highway network that connects the Americas from Alaska to Argentina.

Rather than being one uniformly numbered road, it is a linked system of highways spanning North, Central, and South America. Common descriptions place its northern reach near Prudhoe Bay, Alaska, and its southern reach at Ushuaia, Argentina; routes also connect major cities such as Mexico City, Quito, Lima, and Buenos Aires.

The network is often described as the world’s longest motorable road system, extending roughly 30,000 kilometers when its branches are counted. Its exact length depends on which routes and spurs are included.

A crucial qualification is the Darién Gap between Panama and Colombia. Dense rainforest and the absence of a road interrupt the route, so vehicles cannot drive continuously from Alaska to Argentina. The Alaska Highway is sometimes treated as a northern extension, but it is not the name of the overall inter-American network.