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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]
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 ...
There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. 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 ...
Arizona State Route 90; Arizona State Route 92; Arizona State Route 93; Arizona State Route 95; Arizona State Route 96; Arizona State Route 97; Arizona State Route 98; Arizona State Route 99; Arizona State Route 101; Arizona State Route 143; Arizona State Route 169; Arizona State Route 176; Arizona State Route 177; Arizona State Route 179 ...
There was significant local opposition in the 1960s and 1970s to expansion of the freeway system. [4] Because of this, by the time public opinion began to favor freeway expansion in the 1980s and 1990s, Phoenix freeways had to be funded primarily by local sales tax dollars rather than diminishing sources of federal money; newer freeways were, and continue to be, given state route designations ...
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 .
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 ...