The Longest Road in the United States

Does anyone know what is the longest road in the United States? Hint it connects the Atlantic to the Pacific and is not an Interstate Highway. Give up? It’s U.S. Route 20, a 3,365 mile road that goes through 11 states. Starting in Boston, Mass. on Commonwealth Avenue near Fenway Park and ending in Newport, Oregon, U.S. Route 20 became the longest road in the country in 1963 after U.S. Route 6 was shortened in California.

Richard Weingroff, of the FHWA answers the question of the longest road in detail and describes its numbering and the northwest extension that was added from Yellowstone National Park to the state of Oregon.  

This sign in Newport, Oregon marks the beginning of U.S. Route 20 as it heads due east.


About vtlocalroads

The Vermont Local Roads Program at Saint Michael’s College is part of the Local Technical Assistance Program (LTAP), a nationwide effort financed jointly by the Federal Highway Administration and individual State Departments of Transportation. Its purpose is to provide road and bridge know-how to municipal people involved with highways. There are LTAP Centers in 50 states and Puerto Rico and six Native American locations. Any opinions, findings, conclusions, or recommendations presented on this page are those of the authors and do not necessarily reflect the views of FHWA, VAOT or Saint Michael’s College. All references to proprietary items in this publication are not endorsements of any company or products. Sponsored by the Vermont Agency of Transportation, the Vermont Local Roads Program provides information, training and technical assistance to cities, towns and villages in Vermont. This is done by newsletters, seminars and workshops, distribution of publications and by response to requests.
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