There are a number of different road designations in the United States, from highways and freeways to interstates and routes, and it can cause some confusion with different laws and regulations.
The American Interstate Highway System — the 48,756-mile network of limited-access freeways officially designated ...
Route 66 is not the oldest, longest or most well-travelled long-distance highway in the U.S. So why is it the most famous?
Maps make long roads look easy until you hit a ferry or a national park gap. The Pan-American Highway is a perfect example because the Darién Gap between Panama and Colombia breaks that smooth line.