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The same principle applies with business routes for all other Interstates in Arizona. [3] Designations listed under Highway Logs and GIS data however, use the Arizona Transportation Information System (ATIS) nomenclature. The ATIS designation for a non-suffixed state route is "S (Number)". The number at the end is always three digits long.
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 80 (SR 80) is a 120.20-mile (193.44-kilometre) long, roughly arc-shaped highway lying in southeastern Arizona.Starting in downtown Benson, the highway serves as the main route through the towns of St. David, Tombstone, Bisbee and Douglas before terminating at the New Mexico state line, becoming New Mexico State Road 80 (NM 80).
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.
In 1979, the American Association of State Highway and Transportation Officials (AASHTO) approved a request from California and Arizona to truncate US 66 from the California state line, east to I-40 and US 666 in Sanders. [25] However, Arizona continued to designate and sign US 66 between Sanders and I-40/US 93 in Kingman. [26]
State Route 347 (SR 347) is a 28.69 miles (46.17 km) long, north–south state highway in central Arizona. The route begins at SR 84 and heads north. It passes through Maricopa, meeting SR 238. The route ends at an interchange with Interstate 10 (I-10) south of Chandler.
Arizona State Route 85. The southern terminus of SR 85 is located at the Mexican border near Lukeville in Pima County. From Lukeville to Why, SR 85 is designated the Organ Pipe Cactus Parkway by ADOT. [2] [3] The road continues across the border into Mexico to the town of Sonoyta as Mexican Federal Highway 8.
The highway does provide access to Mount Graham, one of the higher peaks in Arizona at over 10,000 feet (3,000 m). It also provides access to the Mount Graham International Observatory. [1] [2] Part of SR 366 is designated as the Swift Trail Parkway under the Arizona Parkways, Historic and Scenic Roads program. [3]