|
Interstate 11 (I-11) is a proposed Interstate Highway, officially designated by the United States Congress in the 2012 Surface Transportation Act. The highway as currently proposed runs from Casa Grande, Arizona, northwest to Buckeye, Arizona, thence to Kingman, Arizona, and terminates in Las Vegas, Nevada, with a second proposed section extending north from Las Vegas to Reno. This would provide a direct Interstate link between the Las Vegas and Phoenix metropolitan areas. The Interstate is Congressionally enacted as cited above, and signs marking the "Future I-11 Corridor" are now posted in Arizona. There are two signs on the southbound side, at mile marker 2 and on US 93 just south of I-40; and two northbound signs north of Phoenix and Kingman on US 93. The involvement of American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA)—the agencies normally charged with Interstate Highway numbering and planning—has yet to occur. The proposed numbering of the highway does not fit within the usual conventions of the existing Interstate Highway grid, as, at least in the initial phase south of Las Vegas, it would be completely east of I-15 and should therefore have a number greater than 15. But I-17 was already built to the east of the I-11 alignment in Arizona, making it impossible to fit this freeway into the national grid without violating the traditional numbering convention, since this is primarily a north–south route that would receive an odd number. However, the designation of I-11 was deemed the best option available. There are corridor studies underway to examine the viability of extending the Interstate north from Las Vegas to the Canadian border〔 which if constructed would eventually put a majority of I-11 west of I-15 and thus in line with the national grid numbering conventions. ==Route description== As of June 2014, the highway was in a preliminary study phase, and an exact route has yet to be determined. A number of recommended corridor alternatives have been identified; a description of the route along these corridors follows. The southern terminus of the freeway would begin at or near the interchange with I-8 and I-10 in Casa Grande, Arizona, travelling in a generally westward and then northward direction as a bypass route around the Phoenix Metropolitan Area. Two general corridor alternatives have been identified for this bypass section. One recommended alternative would have the highway running concurrently with I-8 west to Gila Bend, turning north at or near the existing intersection with Arizona State Route 85. The highway would then run concurrently with AZ 85 to its intersection with I-10 in Buckeye before turning west to run concurrently with I-10 for some miles. The second recommended alternative would have the highway run concurrently with I-8 east to an intersection with either Loop 303 or the Hassayampa Freeway, and then follow some combination of those highways, Arizona State Route 30, or AZ 85 to an intersection with I-10 in or near Buckeye.〔 North of I-10 near Buckeye, the study has identified a general corridor roughly parallel to the Hassayampa River with two more specific corridor alignments. The first would create a new highway running north to the U.S. Route 60 / State Route 74 intersection in Morristown before turning northwest to run concurrently with US 60 to its intersection with U.S. Route 93 in Wickenburg, thereafter running concurrently with US 93 to the northwest. The second alignment would follow the alignment of the Hassayampa Freeway as proposed by the Maricopa Association of Governments to an intersection with US 93 northwest of Wickenburg in Yavapai County.〔 The highway would then run concurrently with US 93 through northern Arizona, including a concurrency with I-40 in and near Kingman. The highway would then cross the Mike O'Callaghan-Pat Tillman Memorial Bridge into Nevada. In Nevada, the highway would follow a planned bypass of US 93 around Boulder City, intersecting and running concurrently with U.S. Route 95 near Railroad Pass in Henderson.〔 Three alternative corridors have been identified for the highway's route through the Las Vegas Metropolitan Area. The first, a controversial proposal, due to cost and traffic concerns because the freeway is not expected to be completed for a long time, would have the highway continuing to run concurrently with US 93/95/I-515 to an interchange with the Las Vegas Beltway then running concurrently with that highway west and then north around the core of the metropolitan area. The highway would leave the route of the Beltway in northwestern Las Vegas, heading northward to near the intersection of US 95 and Nevada State Route 157.〔 The second alternative has the highway following the US 93/95/I-515 concurrency to downtown Las Vegas, then running concurrently with US 95 to its intersection with NV 157 to the northwest.〔 The third alternative, another controversial proposal, due to cost, environmental and traffic concerns, leaves the US 93/95 concurrency near Railroad Pass and runs north along a new route to an intersection with I-15/US 93 in or near North Las Vegas. The highway would then run concurrently with I-15/US 93 to the southwest until the intersection with the Las Vegas Beltway in North Las Vegas, following its route west to an intersection with US 95 and finally running concurrently with US 95 to the northwest to its intersection with NV 157.〔 All three alternatives would have the highway's northern terminus be at or near the intersection of US 95 and NV 157. 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「Interstate 11」の詳細全文を読む スポンサード リンク
|