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Megaregions of the United States are clustered networks of American cities, the population of which currently ranges or is projected to range from about 57 to 63 million by the year 2025.〔(【引用サイトリンク】title=Megaregions )〕〔(Cities: Capital for the New Megalopolis ).''Time magazine,'' November 4, 1966. Retrieved on July 19, 2010.〕 America 2050,〔(【引用サイトリンク】title=About Us - America 2050 )〕 an organization sponsored by the Rockefeller and Ford Foundations, lists 11 megaregions in the United States and Canada.〔 Megapolitan areas were explored in a July 2005 report by Robert E. Lang and Dawn Dhavale of the Metropolitan Institute at Virginia Tech.〔http://www.mi.vt.edu/uploads/megacensusreport.pdf "Beyond Megalopolis" by the Metropolitan Institute at Virginia Tech〕 A later 2007 article by Lang and Nelson uses 20 megapolitan areas grouped into 10 megaregions.〔http://www.des.ucdavis.edu/faculty/handy/ESP171/Readings2/Megapolitans.pdf ''The Rise of the Megapolitans'' (January 2007) by Robert E. Lang and Arthur C. Nelson. Retrieved on January 7, 2013.〕 The concept is based on the original megalopolis model.〔 ==Definition== A megaregion is a large network of metropolitan regions that share several or all of the following: * Environmental systems and topography * Infrastructure systems * Economic linkages * Settlement and land use patterns * Culture and history〔Regional Plan Association (2006). ''America 2050: A Prospectus.'' New York, NY: Regional Plan Association.〕 A megaregion may also be known as a megalopolis or megapolitan area. More than 70 percent of the nation's population and jobs are located in 11 megaregions identified by the Regional Plan Association, which is an independent, non-profit New York-based planning organization. Megaregions are becoming the new competitive units in the global economy, characterized by the increasing movement of goods, people and capital among their metropolitan regions.〔 "The New Megas," asserted Florida (2006), "are the real economic organizing units of the world, producing the bulk of its wealth, attracting a large share of its talent and generating the lion's share of innovation."〔 The megaregion concept provides cities and metropolitan regions a context within which to cooperate across jurisdictional borders, including the coordination of policies, to address specific challenges experienced at the megaregion scale, such as planning for high-speed rail, protecting large watersheds, and coordinating regional economic development strategies. The Regional Plan Association recognizes 11 emerging megaregions:〔Hagler, Yoav (2009). "Defining U.S. Megaregions." New York, NY: Regional Plan Association. 〕 * Arizona Sun Corridor Megaregion (extends into Mexico) * Cascadia Megaregion (Pacific Northwest; shared with Canada) * * The RPA definition of this region includes the Boise metropolitan area in Idaho. That state is included in some definitions of the Pacific Northwest, but the Boise area is removed by hundreds of miles from any other area included in the RPA's definition of "Cascadia". * Florida Megaregion * Front Range Megaregion * * The RPA definition of this region extends well to the south of the Colorado–Wyoming area typically called the Front Range Urban Corridor, following the Interstate 25 corridor into New Mexico and incorporating Santa Fe and Albuquerque. The RPA definition also includes the geographically detached Wasatch Front of Utah. * Great Lakes Megaregion (shared with Canada) * Gulf Coast Megaregion * * The RPA definition of this region includes the entirety of two metropolitan areas that straddle the U.S.–Mexico border, specifically Matamoros–Brownsville and Reynosa–McAllen. * Northeast Megaregion * Northern California Megaregion * * The RPA definition includes the Nevada portion of the Reno–Tahoe area. * Piedmont Atlantic Megaregion * Southern California Megaregion * * The RPA definition includes the Las Vegas Valley, as well as the Tijuana area in Mexico. * Texas Triangle Megaregion * * The RPA definition includes the geographically detached Oklahoma City–Tulsa corridor in Oklahoma. 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「Megaregions of the United States」の詳細全文を読む スポンサード リンク
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