1. Pan-American Highway:

Total length: 48,000 km (approximately 29,826 miles)

Countries: Starting in the United States, it passes through Mexico, Central America, and numerous South American countries before ending in Argentina.

2. Trans-Siberian Highway:

Total length: 11,100 km (approximately 6,896 miles)

Countries: Russia

3. Trans-Canada Highway:

Total length: 7,821 km (approximately 4,860 miles)

Countries: Canada

4. U.S. Route 20:

Total length: 5,415 km (approximately 3,365 miles)

Countries: United States

5. Australian Outback Highway:

Total length: 2,840 km (approximately 1,765 miles)

Countries: Australia

6. China National Highway 318:

Total length: 5,476 km (approximately 3,403 miles)

Countries: China

7. The Golden Quadrilateral:

Total length: 5,846 km (approximately 3,633 miles)

Countries: India

8. Trans-African Highway:

Total length: Approximately 40,000 km (24,855 miles)

Countries: The Trans-African Highway is actually a network of various highways that connect cities and countries across Africa.

9. National Highway 44 (India):

Total length: 4,087 km (approximately 2,540 miles)

Countries: India

Some of these roads, like the Pan-American Highway, Trans-Siberian Highway, and Trans-Canada Highway, are famous for their scenic landscapes and diverse cultures. Others, like U.S. Route 20 and China National Highway 318, have historical significance. Please note that the accuracy and completeness of this information might change over time, so I recommend checking relevant sources for the most up-to-date information.