The vast network of Interstate highways developed in the second half of the 20th century fueled economic growth and created the trucking industry we know today. Here is how it was conceived, created ...

The story of America’s interstates is usually told as a straightforward tale of postwar progress, but the real origins are stranger and more contested than the green signs suggest. The Dwight D.

Next time you’re cruising on the interstate, take some time to spot all the different highway shields. Are there single digits? Double? Triple, even? What do the odd and even numbers actually mean?

Since the Interstate highway system was created from whole cloth, rather than emerging through the years, it shouldn’t come as a surprise that there is a defined logic to the numbering system that ...

There were roads across the United States before 1926, but they weren’t systematically named, numbered or otherwise organized. Instead, the country was crisscrossed by a series of loosely connected ...

Legislation dictating how a future expansion of Interstate 27 will be named recently passed the U.S. House of Representatives, marking another win for the Ports-to-Plains Corridor. The I-27 Numbering ...

Since this is the 50th anniversary of the interstate highway system, we?ve been answering a lot of questions about why things are the way they are on interstates. Bob wrote in with one of my favorite ...