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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 ...
The United States Numbered Highway System (U.S. Highway System) was originally approved by the United States Department of Agriculture Joint Board on Interstate Highways on November 11, 1926, and was to be overseen and maintained by the American Association of State Highway Officials (AASHO). [2]
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, odd-numbered Interstates run south–north, with lower ...
Interstate 10 Business (Quartzsite, Arizona) Interstate 10 Business (Tucson, Arizona) 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 ...
The Arizona Department of Transportation (ADOT) internally recognizes Interstate Highways, U.S. Highways and Arizona Highways as all being separate types of highway designations. State highways within Arizona are referred to as Arizona State Routes or State Routes , with the prefix "SR" being used for abbreviations.
The Arizona Department of Transportation (ADOT, / ˈ eɪ d ɒ t /) is an Arizona state government agency charged with facilitating mobility within the state. In addition to managing the state's highway system, the agency is also involved with public transportation and municipal airports. The department was created in 1974 when the state merged ...
U.S. Route 95 was a late addition to Arizona's U.S. Highway system, having been extended into the state around 1960 during the dawn of the Interstate Highway System. [6] [7] Though it is a short section of highway, only traveling between Ehrenberg and San Luis at the Mexico–United States border, it also serves as the main north–south highway to the cities of Yuma, San Luis, and Quartzsite. [2]
I‑10 in Arizona was laid out by the Arizona Highway Department in 1956–1958 roughly paralleling several historic routes across the state. Particularly east of Eloy, it follows the Butterfield Stage and Pony Express routes, and loops south to avoid the north–south Basin and Range mountains prevalent in the state.