At the very inception of the interstate system, officials decided the numbers would not be random. Highways already existed at the time, and they needed a network that would coexist alongside them and ...

At first glance, the U.S. Interstate Highway system might seem like a logical grid-based masterpiece with a semblance of order behind its numbering system. Odd-numbered interstates run from north to ...

It’s my understanding that north and south interstate routes are odd numbered and the ones running east and west are even numbers. Why is Interstate 26, which runs north and south, an even number? Why ...

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.