Interstate 19 (I-19) is an intrastate Interstate Highway located entirely within the state of Arizona. I-19 runs from Nogales, roughly 1,500 feet (460 m) from the Mexican border, to Tucson, at Interstate 10. Having a total length of just over 63 miles (101 km), I-19 is the fourth shortest primary (two-digit) Interstate in the contiguous 48 states, where only I-97, Interstate 73, and Interstate 86 in Idaho are shorter.
While the highway is short, it is a very important corridor, serving as a fast route from Tucson and Phoenix (via I-10) to the Mexican border. The highway is a portion of the United States section of the CANAMEX Corridor, a trade corridor that stretches north from Mexico across the United States to the Canadian province of Alberta.
Read more about Interstate 19: Route Description, History, Exit List
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