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The Arizona Department of Transportation (ADOT) is the agency responsible for building and maintaining the Interstate Highways in the Arizona State Highway System. These highways are built to Interstate Highway standards , which are freeways that have a 75-mile-per-hour (121 km/h) speed limit in rural areas and a 65 mph (105 km/h) speed limit ...
U.S. Highways replace the prefix "S" used by State Routes under the ATIS nomenclature with "U" while Interstate Highways use the prefix "I". [1] Suffixed routes under ATIS always have the internally applied suffix between the prefix. [3] State Business Route 79 under ATIS nomenclature is referred to as "SB079" and SR 93X is "SX093". [1]
These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, even-numbered Interstates run east–west, with lower numbers in the south and higher numbers in the north; odd-numbered Interstates run north–south, with lower numbers in ...
Five Interstates were planned in Arizona to supplant or bypass existing U.S. Highways. US 60 between Ehrenberg and Phoenix was to be replaced by the western section of the newly planned Interstate 10 (I-10), I-8 and the eastern section of I-10 were to bypass or replace the entirety of US 80, I-40 was to replace the entirety of US 66, I-17 and I ...
Interstate 10 Business (Willcox, Arizona) Interstate 410 (Arizona) Interstate 510 (Arizona) Interstate 710 (Arizona) Interstate 15 in Arizona; Interstate 17; Interstate 19; Interstate 19 Business (Nogales, Arizona) Interstate 19 Business (Sahuarita–Tucson, Arizona) Interstate 40 in Arizona; Interstate 40 Business (Ash Fork, Arizona ...
Tennessee signs the southern end at US 27 north of Chattanooga US 129: 582: 937 US 19, US 27 Alt., US 98 in Chiefland, FL: I-40 in Knoxville, TN: 1926: current US 130: 83: 134 I-295, US 40 southwest of Penns Grove, NJ: US 1 southwest of New Brunswick, NJ: 1926: current Intrastate, New Jersey only US 131: 271: 436 I-80, I-90 north of Middlebury, IN
The Southern Pacific Sunset Route line had to take the route of least hills, and in the 1920s highways were laid down next to the trains across southern Arizona. When the project was being designed in the 1950s, the Arizona Highway Department fought for a nearly straight-shot west from Phoenix for the new freeway, instead of angling northwest ...
U.S. Route 160 (US 160), also known as the Navajo Trail, is a U.S. Highway which travels west to east across the Navajo Nation and Northeast Arizona for 159.35 miles (256.45 km). US 160 begins at a junction with US 89 north of Cameron and exits the state into New Mexico south of the Four Corners Monument .