@norbertobriceno: Kinda Interesting Tucson #1: The Only Major Highway In The U.S. Measured In Kilometers If you come to Tucson, you'll find one of the strangest roads in America. Interstate-19 is the only major highway in the United States where the road signs are listed in kilometers instead of miles. Here's the story behind this unusual stretch of road and why it exists in the Arizona desert. One of the best things about visiting Tucson is discovering how closely the city is connected to Mexico and the broader Sonoran Desert region. Sometimes, that history shows up in unexpected places, even on a highway sign. #OurCulturaGrowsWild #NuestraCulturaGrowsWild #sponsored by @Visit Tucson