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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.
State Route 172 (SR 172) was a 14.01-mile (22.55-kilometre) long state highway along the western part of Arizona. [22] It was established for a route from the town of Parker to Parker Dam, along the Colorado River on March 10, 1958. [100] An extension to US 66 near Topock was proposed, and approved on January 10, 1961. [101]
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 the U.S. state of Arizona, Interstate 10 (I‑10), the major east–west Interstate Highway in the United States Sun Belt, runs east from California, enters Arizona near the town of Ehrenberg and continues through Phoenix and Tucson and exits at the border with New Mexico near San Simon.
Arizona State Route 101 (SR 101) or Loop 101 is a semi-beltway looping around the Phoenix Metropolitan Area in central Arizona, United States. It connects several suburbs of Phoenix , including Tolleson , Glendale , Peoria , Scottsdale , Mesa , Tempe , and Chandler .
The project includes resurfacing Highway 100 from Shepard Avenue to Highway 32 with asphalt. Traffic signal improvements are also planned at Nicholson Road. Payne and Dolan is the prime contractor.
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 .
While most of US 93 is a four-lane divided highway, sections of the highway between Wickenburg and I-40 are still narrow two-lane roads, gradually being upgraded to match the rest of the route. As part of a proposal by municipal leaders in Nevada and Arizona, the highway could be replaced by Interstate 11 (I-11).