From Alaska to Argentina: 10 longest roads that span the globe

Roads are among the most important parts of global infrastructure, connecting countries, cultures and economies. Certain highways cross continents, turning them into feats of engineering. The list below features the top 10 longest roads in the world is based on their respective approximate lengths.

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The Trans-Siberian Highway runs across Russia from the western part near the city of St. Petersburg to the eastern part close to the city of Vladivostok. The road crosses numerous forest territories and high mountains, and even some extremely distant areas on Earth. The road has extreme climate conditions, which make traveling across it rather difficult, especially during severe winters.

Perhaps the most well-known road system in the world is the Pan-American Highway, which runs from Prudhoe Bay, Alaska (USA) to Ushuaia in Argentina. Spanning 14 nations, the Pan-American Highway links North, Central, and South America in one grand highway system. The highway travels through a variety of terrains, from deserts and mountains, to jungles and even tundra regions. The road is interrupted by the Darién Gap in Panama-Colombia, a rainforest that breaks the link between the two sides.

The Australian Highway 1 is a large ring road running along all borders of the country, thus becoming an absolutely unique road system on Earth. The road connects several big cities like Sydney, Melbourne, Brisbane, Perth, and Darwin, creating a continuous loop called “Big Lap.” Moreover, the road plays a key role in connecting the coast of the country and is considered the longest national highway in one country.

The Trans-Canada Highway is the major artery of Canada's highway system, which stretches from Victoria, the capital city of British Columbia, on the Pacific coast, to St. John's, the provincial capital of Newfoundland, on the Atlantic coast. The Trans-Canada Highway travels through all ten provinces of Canada and offers an array of scenery from the mountains to the forests, from the plains to the coasts. This highway is not only one of the longest highways in the world but also one of its busiest routes for transporting goods and people.

The Golden Quadrilateral Highway Network is the main highway network of India that connects four metropolis cities—Delhi, Mumbai, Chennai, and Kolkata—together forming a quadrilateral shape. The Golden Quadrilateral is a project initiated by the Indian Government to promote the economic activity of the country.

Asian Highway 1 forms part of a more extensive international road system that serves to enhance connectivity within Asia. It begins at Tokyo in Japan and ends on the Turkish-Bulgarian border, covering several countries during its course. The Asian Highway 1 serves as a major transportation route for international trade, thereby forming one of the world's longest and most notable transnational highways.

The U.S. Route 20 spans from Boston in Massachusetts to Newport in Oregon and is the longest highway in the United States. U.S. Route 20 covers 12 different states and traverses various terrains such as urban areas, farmlands, forests, and mountain ranges.

The U.S. Route 6 is another significant transcontinental highway that runs through the USA, going from Massachusetts to California. Commonly known as the "Grand Army of the Republic Highway," it represents an important part of American history and used to be a major east-west artery of the country. In total, the road will take you through numerous small towns, breathtaking rural landscapes, and several states.

The Interstate 90 is the longest Interstate Highway in the United States running from Seattle in the Pacific region to Boston in the Atlantic coast area. The main cities through which this artery passes include Chicago and Cleveland. Apart from being one of the most famous American roads, Interstate 90 serves as a crucial transportation route for commercial and passenger traffic alike.

The Trans-African Highway 1 or Tripoli-Cape Town Highway is a very long transcontinental highway in Africa. The highway starts in Libya and ends in South Africa, thus running through several African countries. Despite the fact that there are some unconstructed