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The N-35 (Karakoram Highway) in Pakistan - Landslides, floods and mud can block this northern Pakistan mountain road that passes through deep gorges and is a route to China. (Getty Images)
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The Old Yungus Road - A car is seen here travelling along the road connecting the city of La Paz to the Coroico in the North Yungas, Bolivia. Referred to as the world's most dangerous road by the Inter-American Development Bank, the road, a narrow dirt track, descends nearly 11,800ft in just 40 miles. With no other options currently available, vehicles are forced to drive it, resulting in hundreds of annual deaths as trucks, buses and passenger cars plunge thousands of feet. Bolivia, the poorest country in Latin America, has just elected Evo Morales as President, bringing a sense of hope that infrastructure and living conditions will finally improve. (Getty Images)
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Sichuan-Tibet Highway - Trucks are seen driving along a Sichuan highway beside the Yangtze River separating Sichuan from Yunnan province in the remote mountains near the Ganden Dhondrupling Monastery in the Deqen Tibetan Autonomous Prefecture of southwest China's Yunnan province. (Getty Images)
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Highway 1 in Mexico - A winding, narrow potholed road from Tijuana to Cabo San Lucas that lacks guard rails, shoulders and road signs.
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Prithvi Highway, Nepal - Landslides and road cave-ins during the rainy season are common on this narrow road with heavy traffic linking Kathmandu to Pokhara.
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The N3, South Africa - It forms a part of the road system, connecting Johannesburg and Durban, respectively South Africa's largest and second-largest cities. Johannesburg is the financial and commercial heartland of South Africa, while Durban is South Africa's key port and one of the busiest ports in the Southern Hemisphere and is also a holiday destination. Durban is the port through which Johannesburg imports and exports most of its goods. As a result, the N3 is a very busy highway and has a high volume of traffic, even though the distance covered is just short of 600 kilometres.