Top 10 Longest Highway Routes in the World
Roads have always connected people, cultures, and economies. Some highways are so long that they cross entire countries, deserts, mountains, forests, and even multiple climate zones. These engineering marvels are not only important for transportation but also play a major role in trade, tourism, and national development.
In this article, we'll explore the Top 10 Longest Highway Routes in the World, their total length, the countries they pass through, and why they are so important.
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| world's 10 longest highway routes |
1. Pan-American Highway
Length: Approximately 30,000 km (18,640 miles)
The Pan-American Highway is widely recognized as the longest continuous road system on Earth. It stretches from Prudhoe Bay, Alaska (USA) all the way to Ushuaia, Argentina, connecting nearly every country in North and South America.
Although there is a break known as the Darién Gap between Panama and Colombia, the highway remains the world's longest road network.
Highlights
- Passes through over 14 countries
- Crosses deserts, jungles, mountains, and coastlines
- Popular among long-distance adventure travelers
2. Asian Highway 1 (AH1)
Length: Around 20,557 km (12,774 miles)
Asian Highway 1 is the longest route in the Asian Highway Network. It starts in Tokyo, Japan, and ends in Turkey, linking East Asia with Europe.
The highway plays a vital role in international trade and transportation.
Highlights
- Connects 11 countries
- Important trade corridor
- Supports economic growth across Asia
3. Trans-Siberian Highway
Length: Around 11,000 km (6,835 miles)
Russia's Trans-Siberian Highway stretches from Saint Petersburg to Vladivostok on the Pacific coast.
Traveling this highway means crossing forests, rivers, mountains, and some of the coldest regions on Earth.
Highlights
- Crosses the entire width of Russia
- One of the world's greatest road engineering projects
- Connects Europe and Asia
4. Trans-Canada Highway
Length: Approximately 7,821 km (4,860 miles)
The Trans-Canada Highway is Canada's national highway system. It stretches from the Atlantic Ocean to the Pacific Ocean.
It links all ten Canadian provinces and serves as the country's transportation backbone.
Highlights
- Connects major Canadian cities
- Scenic mountain and coastal views
- Important for tourism and freight
5. U.S. Route 20
Length: About 5,415 km (3,365 miles)
U.S. Route 20 is the longest highway in the United States. It runs from Boston, Massachusetts, to Newport, Oregon.
The route passes through forests, farmland, deserts, and bustling cities.
Highlights
- Crosses 12 U.S. states
- Rich historical significance
- Beautiful landscapes throughout the journey
6. National Highway 44 (India)
Length: Approximately 3,745 km (2,327 miles)
National Highway 44 is India's longest highway. It stretches from Srinagar in the north to Kanyakumari in the south.
The highway connects diverse cultures, climates, and landscapes.
Highlights
- Runs through 11 Indian states
- Vital trade and tourism route
- Connects the Himalayas to the Indian Ocean
7. Highway 1 (Australia)
Length: Around 14,500 km (9,010 miles)
Australia's Highway 1 circles almost the entire continent, making it the world's longest national highway.
It connects every mainland state capital except Canberra, which is linked through a connecting route.
Highlights
- Encircles Australia
- Passes beaches, deserts, and rainforests
- Popular road trip destination
8. BR-116 (Brazil)
Length: Around 4,660 km (2,896 miles)
BR-116 is Brazil's longest highway, stretching from the northeastern city of Fortaleza to the southern border with Uruguay.
It is one of the busiest highways in South America.
Highlights
- Connects major Brazilian cities
- Essential for agriculture and trade
- Heavy commercial traffic
9. Ruta Nacional 40 (Argentina)
Length: About 5,194 km (3,227 miles)
Argentina's National Route 40 runs alongside the Andes Mountains from north to south.
It is famous for breathtaking scenery and attracts thousands of tourists every year.
Highlights
- Passes through 20 national parks
- Runs parallel to the Andes
- Popular among adventure travelers
10. National Highway 27 (India)
Length: Approximately 3,507 km (2,179 miles)
National Highway 27 stretches from Porbandar in western India to Silchar in eastern India.
It forms one of India's most important east-west transportation corridors.
Highlights
- Crosses several major states
- Supports national logistics
- Important for economic development
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