In 2010 it covered 47,182 miles.
In 2010 it covered 47,182 miles.
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As of 2012, the US interstate highway system includes almost 50,000 miles.
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As of 2006, there were 46,876 miles of roadway in the Dwight D. Eisenhower National System of Interstate and Defense Highways.
The United States contains about 75,000 km of highways. It also has more than four million kilometers of paved roads.
47,856 miles
The length of an interstate highway can vary significantly, as there are thousands of miles of interstate roadways across the United States. The entire Interstate Highway System spans approximately 48,000 miles. Individual interstate routes can range from a few miles to over 3,000 miles, like Interstate 90, which is the longest in the system.