I had just started driving when the mixed mile/kilometer signs started going up in my state. For a short while (very short..), gasoline was even sold in liters.

I had just started driving when the mixed mile/kilometer signs started going up in my state. For a short while (very short..), gasoline was even sold in liters. I haven't had the opportunity to drive it yet, but Interstate 19 in Arizona is the only highway in America that is marked in kilometers. https://azdot.gov/blog-article/kilometers-arizona-you-bet https://azdot.gov/blog-article/kilometers-arizona-you-bet