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In the U.S. state of Arizona, U.S. Route 93 is a U.S. Highway that begins in Wickenburg and heads north to the Nevada border at the Mike O'Callaghan – Pat Tillman Memorial Bridge. As part of a proposal by municipal leaders in Nevada and Arizona, the highway could be replaced by Interstate 11. ==Route description== The following narrative runs in the ''descending'' reference post direction. Arizona has always signed this particular route with its zero mile point located at the Nevada border. Until October 19, 2010, that point was on the crest of Hoover Dam, but ever since has been at the state line along the new Mike O'Callaghan – Pat Tillman Memorial Bridge. The southern terminus of US 93 is located at a junction (rebuilt and relocated between February 2008 and February 2010) with US 60 in Wickenburg, a small town about northwest of Phoenix. It heads towards the northwest from this junction to an intersection with SR 89 (the former US 89) across the Maricopa – Yavapai county line just northwest of town. SR 89 heads northeast to Prescott while US 93 continues its northwesterly heading, as a mainly two-lane highway with passing lanes every few miles. US 93 continues to the northwest to a junction with SR 71 at a diamond interchange southwest of Congress. As it continues to the northwest through this scenic but remote rural area, the highway is known as the Joshua Tree Forest Parkway. The highway widens to four lanes at the Santa Maria River and continues towards the northwest past a junction with SR 97 on its way to the town of Wikieup. Before reaching that town, it passes the tiny settlement of Nothing (just across the Yavapai – Mohave county line) and crosses Burro Creek over dual steel arch bridges about 400 feet over the creek. After passing through Wikieup, US 93 curves north to follow the western edge of the Big Sandy River and one of its tributaries, Knight Creek, on its way toward Interstate 40. At I-40's exit 71, US 93 merges with the Interstate freeway and share the same alignment heading west until they reach Kingman. The two split in Kingman with I-40 heading towards the south to skirt the southern end of the Black Mountains before curving west and into California and US 93 heading northwest towards Las Vegas. A project is currently underway to design and build a free-flowing connection between I-40 and US 93 in western section of Kingman, to avoid the current diamond interchange (exit 48) at Beale Street and the approximately one mile section of congested, undivided roadway that US 93 motorists must navigate before the road widens back into a four-lane divided facility. Northwest of Kingman and just over Coyote Pass, US 93 has an interchange with SR 68 (exit 67). Highway 68 heads west over the Black Mountains to Davis Dam, Laughlin, and Bullhead City (the latter via SR 95), while US 93 continues as a four-lane divided route towards the northwest. Running through the long Detrital Valley, with the Black Mountains to the west and the Cerbat Mountains and then the White Hills to the east, US 93 passes several small settlements in this mostly remote area. As it nears the Nevada border, it enters the Lake Mead National Recreation Area and climbs over Householder Pass, before crossing into Nevada via the Mike O'Callaghan – Pat Tillman Memorial Bridge over Black Canyon just downstream from Hoover Dam. US 93 continues into Nevada to the cities of Boulder City, Henderson and Las Vegas.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「U.S. Route 93 in Arizona」の詳細全文を読む スポンサード リンク
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