This is a very long road. 

The Pan-American Highway is a very long road. 

One part of the road has a big break. This is a place called the Darien Gap. It is a thick, green forest. There are no roads through the trees.
This big road helps many people travel. It is a very special way to see the world.
The Pan-American Highway is the longest road in the world. 

There is a big break in the road. This area is called the Darién Gap. It is a thick, dense rainforest. No roads go through this forest. 
People first thought of a railroad for this route. In 1923, they began to think about a highway instead. This was because cars were replacing trains. Many countries signed a plan in 1937. They wanted to build the roads quickly. Mexico was the first Latin American country to finish its part in 1950.
The Pan-American Highway is the longest road in the whole world. 
There is one big part where the road stops. 
People did not always plan to build a highway. 
Building the road happened in different stages over many years. 

Even though it is one big system, it looks different everywhere. 

The Pan-American Highway is a massive network of roads. It is recognized as the longest road system in the world. This network stretches approximately 19,000 miles, or about 30,000 kilometers. It begins in Prudhoe Bay, Alaska, in North America. The route travels south to Ushuaia, Argentina, at the tip of South America. 
Construction of the highway happened in several distinct stages. The first stage focused on the route from Laredo, Texas, to Mexico City. This occurred shortly after paved roads became common in the United States. The second stage involved building the Inter-American Highway toward Panama City. Before this, many Central American countries had very little road connection or commerce. 
A major interruption exists in the middle of the route. This gap is known as the Darién Gap. It is a dense, roadless rainforest located between Panama and Colombia. 
The idea for an overland route changed significantly over time. In 1884, the U.S. Congress passed a law to build an inter-American rail system. This was a plan for a railroad rather than a highway. This concept was discussed at the First Pan-American Conference in 1889. However, construction never actually started on the rail system. The idea was eventually abandoned after Panama gained independence in 1903. This change happened as work began on the Panama Canal. By 1923, the concept shifted toward a highway. This was because automobiles were replacing railroads for moving people and goods.
Formal agreements helped move the project forward. On July 29, 1937, many nations signed the Convention on the Pan-American Highway. This group included Argentina, Bolivia, Chile, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, Canada, and the United States. They agreed to achieve speedy construction through all adequate means. 
The northern section includes several important routes. In Alaska, the Alaska Highway is a de facto extension of the system. It begins in Prudhoe Bay and follows the Dalton Highway. 


The highway system connects to many broader geographic and political interests. It links the northernmost parts of North America to the southernmost parts of South America. It touches many different climates, from the Arctic in Alaska to the rainforests of the Darién Gap.
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