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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 ...
Interstate 17 (I-17) is a north–south Interstate Highway located entirely within the US state of Arizona. I-17's southern terminus lies in Phoenix, at I-10/US 60 and its northern terminus is in Flagstaff, at Milton Road north of I-40. [1] Most of I-17 is known as the Arizona Veterans Highway.
US 80 was eliminated from Arizona in 1989, after both Arizona and New Mexico had requested AASHTO to remove the designation from both states. [34] What remained of Arizona's section was redesignated as SR 80. [35] In 1992, when US 89 was truncated from Nogales to Flagstaff, and when US 666 was decommissioned, becoming an extension of US 191.
The highway mainly consists of four-lanes (two per side), although some sections in Prescott and Prescott Valley are wider. Prior to the construction of Interstate 17 in the 1960s and early 1970s, State Route 69 continued south to Phoenix, Arizona , as the Prescott-Phoenix Hwy or Black Canyon Highway on a different alignment, through the ghost ...
The highway is notable for its scenic value as it winds over and through Mingus Mountain as well as passing through Sedona and the Oak Creek Canyon. The route then enters Coconino County soon after leaving Sedona. The highway proceeds to Flagstaff, where it crosses Interstate 17 (I-17) and I-40. The highway ends at I-40 Business in Flagstaff ...
State Route 169, also known as SR 169 and Cherry Road, is an east–west highway in central Arizona, with its western terminus at its junction with its parent road State Route 69 at Dewey and its eastern terminus at Exit 278 of Interstate 17.
The Phoenix freeway system heavily utilizes ramp meters, with several currently installed in the metropolitan area located on I-10, I-17, Loop 101, Loop 202 (on the Red Mountain Freeway from I-10 to Gilbert Road, as well as at select interchanges on the SanTan Freeway from Dobson to Gilbert Road), SR 51, and US 60. Since their implementation in ...
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.