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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Eastbound Interstate 78/US Route 22.

The United States has the world's largest network of highways, including both the Interstate Highway System and the US Highway System.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Motorists travel westbound along Interstate 40 after several inches of snow fell during a winter storm in Flagstaff, Arizona.

At least one of these networks is present in every state and they interconnect most major cities.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Shepherds lead their flock of sheep along on the Guozigou segment of the Lianyungang-Horgos expressway as vehicles drive past the other side of the expressway.

China's highway network is the second most extensive in the world, with a total length of about 3.573 million km.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
A general view of heavy traffic on a highway during the morning rush hours in Shanghai.

China's expressway network is also the second longest in the world, and it is quickly expanding, stretching some 85,000 km at the end of 2011.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Pan-American Highway in the Greater Buenos Aires, Argentina.

The Pan-American Highway is longest international highway, which connects many countries in the Americas.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Pan-American Highway in El Salvador.

It stretches across a distance of nearly 47,000 kilometres.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Highway traffic is backed up behind a piece of heavy mining equipment as it rolls though Dalby, 180 km (112 miles) west of Brisbane.

Australia's Highway 1 is a network of highways that circumnavigate the Australian continent, joining all mainland state capitals.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
A snowmobiler crosses the Trans-Canada Highway just north of Oakville, Manitoba.

At a total length of approximately 14,500 km (9,000 mi) it is the longest national highway in the world.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
An aerial photograph shows traffic on the southern portion of the 18-Mile Stretch, a facet of U.S. Highway 1 that connects South Florida with the Florida Keys in Key Largo, Florida.

The United States has the largest national highway system.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
A line of fire trucks make their way down US highway 89 toward the Wood Hollow Fire north of  Fairview, Utah.

It has around 6,430,366 kilometres of highways.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Highway 401.

The Highway 401 in Ontario, Canada has the busiest highway.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST

The 400-series highway stretches 817.9 kilometres from Windsor to the Quebec border.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Katy Freeway.

The Katy Freeway (part of Interstate 10) in Houston, Texas, has the widest highway (maximum number of lanes).

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Cars travel on an almost deserted snow covered downtown highway after an overnight storm dropped five inches of snow in Dallas, Texas.

This section was widened in 2008 to include a total of 26 lanes.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST

Interstate 5 along a 2-mile section between Interstate 805 and California State Route 56 in San Diego is widest highway, with maximum number of through lanes.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST

Completed in April 2007, it is 22 lanes wide.

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World's longest, largest, busiest highways

Last updated on: August 9, 2012 08:27 IST
Karakoram Highway.

The Karakoram Highway, between Pakistan and China, at an altitude of 15,397 ft is the highest international highway.