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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 in ...
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]
State Route 50, also known as the Paradise Parkway, was a proposed urban freeway through Glendale and Phoenix.Originally proposed in 1968 as SR 317, [1] the freeway would have run east to west, connecting the future State Route 51 and Loop 101, while running roughly parallel to, and 4 miles (6.4 km) north of, I-10 in the vicinity of Camelback Road.
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 ...
The 1980s and early 1990s would see the last large scale changes to U.S. Highways in Arizona. In 1981, SR 63 was decommissioned after it and BIA Route 12 became a southern extension of US 191 across the Utah state line into Arizona near Mexican Water, ending at US 66/I-40 in Chambers. [27]
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 ...
Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System.The 323 auxiliary routes generally fall into three types: spur routes, which connect to or intersect the parent route at one end; bypasses, which connect to the parent route at both ends; and beltways, which form a circle that intersects the ...
Arizona State Route 51 (SR 51), also known as the Piestewa Freeway, is a numbered state highway in Phoenix, Arizona. It connects Interstate 10 and Loop 202 just outside Downtown Phoenix with Loop 101 on the north side of Phoenix, making it one of the area's major freeways. It is a largely north–south route and is known for traversing the ...