interstate 19

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.

Length

None

There are two Business Loops: One in Tucson, Arizona, and the other in Nogales, Arizona.

1B - Western Avenue (Nogales)
4 - Mariposa Road (Arizona State Highway 189) South
12 - Arizona State Highway 289
17 - Rio Rico Drive; Yavapi Drive
22 - Peck Canyon Road; Border Patrol Checkpoint
25 - Palo Parado Road
29 - Tumacacori National Historical Park; Carmen
34 - Tubac
40 - Chavez Siding Road (Tubac)
42 - Agua Linda Road
48 - Arivaca Road
53 - Rest Area
56 - Canoa Road
63 - Continental Road; Madera Canyon Recreation Area
65 - Esperanza Boulevard
69 - Business Loop 19 North; Duval Mine Road; Titan Missile National Historical Landmark
75 - Sahuarita
80 - Pima Mine Road
87 - Papago Road
92 - San Xavier Mission
95 - Pascua Yaqui Pueblo; Valencia Road; Tucson Airport
98 - Irvington Road
99 - Ajo Way; Old Tucson
101A - Interstate 10 East; El Paso
101B - Interstate 10 West; Phoenix

The entire route follows the routing of (former) U.S. Highway 89.

Interstate 19 is unique amongst US Interstates, because signed distances are given in kilometers, and not miles. Speed limit signs give speeds in miles-per-hour, however. According to the Arizona Department of Transportation, metric signage was originally placed because of the "metric system push" in the United States at the time of the original construction of the highway. Infrequently, re-signing the highway to miles is discussed, but the costs involved would be too high for a rural Interstate such as I-19.

I-17 and I-19 could eventually join to become one longer interstate which would be renamed I-21.

Nogales, Mexico is the only town on the U.S. - Mexico border, to have the same name as its U.S. counterpart. From the Arizona town to the Mexican one, I-19 becomes Mexico Highway 15.

A recent reconstruction project at the Interstate's northern terminus with Interstate 10 in Tucson, Arizona (at the interchange commonly called "The Crossing") was begun in 2002 and completed in late 2004. http://www.1019crossing.com/

1919

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