I-19 in southern Arizona has its distance signs in meters and kilometers as part of a test during the '70s. There have been plans to change it for a number of y

I-19 in southern Arizona has its distance signs in meters and kilometers as part of a test during the '70s. There have been plans to change it for a number of years but local opposition has stalled it. https://en.wikipedia.org/wiki/Interstate_19 https://en.wikipedia.org/wiki/Interstate_19