If you think about it, of course the longest road in the United States is going to be coast to coast. But with so many coastal states, it's pretty cool that Boston, Massachusetts, is where it begins or ends, depending on your drive.

For New Englanders, I think it's safe to say it starts here.

Microsoft Maps
Microsoft Maps

We know that our national highways and roadways have been a patchwork since they started to be the main way to get around.  According to 24/7 Tempo, that changed with the Federal-Aid Highway Act of 1956, otherwise known as the Dwight D. Eisenhower National System of Interstate and Defense Highways.

Whew, that's a mouthful.  But there's a reason I shared it, so stay with me here.

The United States has nearly 45,000 miles of highways, says 24/7 Tempo. Interestingly, the longest highway in the entire country is not part of that interstate system. It actually comes from the patch-working system, and it's US Route 20.

Microsoft Maps
Microsoft Maps

Yes, according to the Department of Transportation, U.S. Route 20 is the longest highway in the country at 3,365 miles, going coast to coast from Massachusetts to Oregon. Massachusetts even has a sign for it.

The DOT says it runs through 12 states: Massachusetts, New York, Pennsylvania, Ohio, Indiana, Illinois, Iowa, Nebraska, Wyoming, Montana, Idaho, and Oregon.

24/7 Tempo explains that it's quite a famous route for more than just being the longest in the country. There's even a nonprofit called The Historic US Route 20 Association with a detailed history, store, and newsletters.

If you're into long-distance road trips that take longer than a traditional highway, this just may be your next adventure.

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