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The Arizona State Highway system was introduced on September 9, 1927, by the State Highway Commission (formed on August 11 of the same year). It incorporated the new federal aid system and also the U.S. Highway system. The 1927 plan included 27 state routes, most of which were simply dirt roads.
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]
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 ...
State Route 77 (SR 77) is a 253.93-mile (408.66-kilometre) long state highway in Arizona that traverses much of the state's length, stretching from its southern terminus at a junction with I-10 in Tucson to its northern terminus with BIA Route 6 at the Navajo Nation boundary just north of I-40.
Arizona State Route 66; Arizona State Route 67; Arizona State Route 68; Arizona State Route 69; Arizona State Route 71; Arizona State Route 72; Arizona State Route 73; Arizona State Route 74; Arizona State Route 75; Arizona State Route 76; Arizona State Route 77; State Route 78 (Arizona–New Mexico) Arizona State Route 79; Arizona State Route ...
Due to the popularity of the Lee Highway, the state-designated Roosevelt Dam name became largely forgotten by the traveling public. Between 1917 and 1921, the route from Solomonsville to Geronimo was paved. It along with the Borderland Highway between Bisbee and Douglas became the first two paved state highways in Arizona. With a second ...
U.S. Route 191 (US 191) is a north–south U.S. Highway in eastern Arizona.The highway runs for 516.50 miles (831.23 km), making it Arizona's longest numbered highway. The highway begins at State Route 80 near Douglas and crosses over the Utah state line near Mexican Water in the Navajo Nat
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 .
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