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, based on their respective approximate lengths.
10 Longest Roads in the World
Trans-Siberian Highway (≈ 11,000 km / 6,800 miles)
The Trans-Siberian Highway runs across Russia from the western part near St. Petersburg to the eastern part close to Vladivostok. The road crosses numerous forest territories and high mountains, including some extremely distant areas on Earth. Extreme climate conditions make traveling difficult, especially during severe winters.
Pan-American Highway (≈ 30,000 km / 19,000 miles)
Perhaps the most well-known road system globally, the Pan-American Highway runs from Prudhoe Bay, Alaska (USA) to Ushuaia in Argentina. Spanning 14 nations, it links North, Central, and South America in one grand highway system. The highway travels through deserts, mountains, jungles, and tundra. It is interrupted by the Darién Gap, a rainforest between Panama and Colombia.
Highway 1, Australia (≈ 14,500 km / 9,000 miles)
Australian Highway 1 is a large ring road running along the country's borders, making it a unique road system. It connects major cities like Sydney, Melbourne, Brisbane, Perth, and Darwin, creating a continuous loop known as the "Big Lap." It is the longest national highway in a single country.
Trans-Canada Highway (≈ 7,800 km / 4,860 miles)
The Trans-Canada Highway is Canada's major artery, stretching from Victoria, British Columbia, on the Pacific coast to St. John's, Newfoundland, on the Atlantic coast. It travels through all ten provinces, offering scenery from mountains to forests, plains to coasts. It is one of the busiest routes for transporting goods and people.
Golden Quadrilateral (≈ 5,846 km / 3,600 miles)
The Golden Quadrilateral Highway Network is India's main highway network, connecting four metropolitan cities: Delhi, Mumbai, Chennai, and Kolkata, forming a quadrilateral shape. Initiated by the Indian government, it promotes economic activity across the country.
Asian Highway 1 (≈ 20,557 km / 12,774 miles)
Asian Highway 1 is part of an extensive international road system enhancing connectivity within Asia. It starts in Tokyo, Japan, and ends at the Turkish-Bulgarian border, covering several countries. It serves as a major transportation route for international trade, making it one of the world's longest transnational highways.
U.S. Route 20 (≈ 5,400 km / 3,300 miles)
U.S. Route 20 spans from Boston, Massachusetts to Newport, Oregon, making it the longest highway in the United States. It covers 12 states and traverses urban areas, farmlands, forests, and mountain ranges.
U.S. Route 6 (≈ 5,200 km / 3,200 miles)
U.S. Route 6 is another significant transcontinental highway in the USA, running from Massachusetts to California. Known as the "Grand Army of the Republic Highway," it represents an important part of American history and was a major east-west artery. It passes through small towns, rural landscapes, and several states.
Interstate 90 (≈ 4,990 km / 3,100 miles)
Interstate 90 is the longest Interstate Highway in the United States, running from Seattle, Washington to Boston, Massachusetts. Major cities along the route include Chicago and Cleveland. It is a crucial transportation route for commercial and passenger traffic.
Trans-African Highway 1 (Tripoli–Cape Town Highway) (≈ 10,800 km / 6,700 miles)
The Trans-African Highway 1, or Tripoli-Cape Town Highway, is a very long transcontinental highway in Africa. It starts in Libya and ends in South Africa, running through several African countries. Some sections remain unconstructed, but it aims to improve connectivity across the continent.
