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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).
Highway names; Interstates: Interstate X (I-X) ... planned in one more: Arizona I-12: 85.59: 137.74 I-10 in Baton Rouge, ... Longest primary north-south Interstate ...
Until the early 1970s, this was the last freeway stretch until Phoenix. The "Brenda Cutoff" was named for a gas station on the old road just east of the fork where US 60 now terminates at I-10. Now an obscure name, "Brenda Cutoff" was the working title that the Arizona Highway Department called the stretch of freeway from US 60 to near Buckeye.
Interstate 10 (I-10) is the southernmost transcontinental highway in the Interstate Highway System of the United States. It is the fourth-longest Interstate in the country at 2,460.34 miles (3,959.53 km), following I-90, I-80, and I-40. It was part of the originally planned Interstate Highway network that was laid out in 1956, and its last ...
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.
[a] This is a list of the longest state highways in each state. As of 2007 [update] , the longest state highway in the nation is Montana Highway 200 , which is 706.624 miles (1,137.201 km) long. The shortest of the longest state highways is District of Columbia Route 295 , which is 4.29 miles (6.90 km) long.
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]
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.