How Many Miles of Road Are in the USA
The US road network is one of the largest in the world, spanning millions of miles across every state. Total road miles grow slightly each year.
How Many Miles of Road Are in the USA
The United States has 4,219,172 miles of public road. That is the 2023 figure from the Federal Highway Administration, the most recent year available. For scale, that is enough road to circle the Earth about 169 times. Counting every individual lane, those road miles add up to 8,950,326 lane miles.
Is the USA Still Building More Roads
The USA is still adding roads, but at a slower pace than it once did. Growth is smaller now because most of the network is already built. New mileage comes mostly from subdivisions and connector roads rather than major highway expansion.
The country added about 1,749 miles of public road between 2022 and 2023. Mileage has grown almost every year for over a century, rising from 2.32 million miles in 1900 to 4.22 million miles today.
What is the Longest Road in America
The longest road in the country is US Route 20. It runs 3,365 miles from Boston, MA to Newport, OR, crossing 12 states. The route splits at Yellowstone National Park, where unnumbered park roads carry traffic between its east and west sections.
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