Interstate 19 is an intrastate interstate highway located entirely within the state of Arizona, United States. It goes from Nogales, Arizona at the Mexican border to Tucson, Arizona at Interstate 10.
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2 Major Cities Along the Route 3 Intersections with other Interstates 4 Spur Routes 5 History 6 Notes |
A recent reconstruction project at the Interstate's northern terminus at Interstate 10 in Tucson, Arizona (at the interchange commonly called "The Crossing") was begun in 2002. It is scheduled to be completed in late 2004. [1]Number of Miles
63.35
Major Cities Along the Route
Intersections with other Interstates
Spur Routes
NoneHistory
The entire route follows the routing of (former) US Highway 89.Notes
Interstate 19 is unique amongst US Interstates, in that the distance measurements are given in kilometers, and not miles. Speed limit signs are still, however, in miles-per-hour. According to the Arizona Department of Transportation, this was originally done because of the metric system push in the United States at the time of the highway's original construction. Infrequently, there is talk of resigning the highway to miles, but the costs involved for what amounts to a rural Interstate dictate retaining the original markings.
