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The longest Interstate in Arizona is I-10, which spans 392.33 miles (631.39 km) [1] across southern and central Arizona, and the shortest Interstate is I-15, which only traverses the northwestern corner of the state, running from Nevada to Utah, spanning only 29.39 miles (47.30 km).
Upon completion, the bridge became one of the longest highway structures in the state of Arizona and was at first the longest steel bridge as well. [1] The bridge was added to the National Register of Historic Places on May 5, 1981. [8] Throughout the 1920s and 1930s, US 80 received many upgrades and modifications to its roadway including pavement.
At 2,887 feet (880 m), it ranks as the 42nd longest vehicular tunnel in the United States. [ citation needed ] The underpass was the last section of Interstate 10 to be completed nationwide. There is a plaque dedicated to the commemoration of the tunnel in Margaret T. Hance Park , which sits above the structure.
I-10 through Arizona is designated a "Purple Heart Trail", after the Purple Heart, the award received by American soldiers wounded in combat. [2] The western terminus is located at the California border at the Colorado River in La Paz County where I-10 continues westward into California towards Los Angeles.
Longest Interstate highway I-91: 290.37: 467.31 I-95/Route 34 in New Haven, Connecticut: A-55 at Canadian border in Derby Line, Vermont: 1958: current Serves three states: Connecticut, Massachusetts, Vermont Associated routes: I-291, I-391, I-691: I-93: 189.95: 305.69 I-95/US 1 in Canton, Massachusetts: I-91 in St. Johnsbury, Vermont: 1957: current
In 1988, US 64 was extended from New Mexico into Arizona over SR 504 to US 160 in Teec Nos Pos. [32] Coincidentally, the small section of US 64 in Arizona was once designated as a section of SR 64. [33] US 80 was eliminated from Arizona in 1989, after both Arizona and New Mexico had requested AASHTO to remove the designation from both states. [34]
The same principle applies with business routes for all other Interstates in Arizona. [3] Designations listed under Highway Logs and GIS data however, use the Arizona Transportation Information System (ATIS) nomenclature. The ATIS designation for a non-suffixed state route is "S (Number)". The number at the end is always three digits long.
Name Image Built Listed Location County Type Alchesay Canyon Bridge: 1904, 1905 1988-09-30 Roosevelt: Maricopa: Filled spandrel arch: Allentown Bridge