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What is the world's longest rood tunnel?

The world's longest road tunnel is the 10.14-mile (16-kilometer) long, two-lane St. Gotthard road tunnel from Goschenen to Airolo, Switzerland. It opened to traffic on September 5, 1980.

The longest road tunnel in the United States is the 1.69-mile (2.7-kilometer) long twin Eisenhower Memorial Tunnel on Interstate 70. It runs beneath the Continental Divide in Colorado. (The Continental Divide is a continuous ridge of peaks in the Rocky Mountains that marks the boundary between eastward flowing waters and westward flowing waters in North America.)

Source: The Guinness Book of Records 1996, p. 103.

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