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|terminus_b= near Argo |previous_type=SR |previous_route=759 |next_type=SR |next_route=1 }} Interstate 422, Corridor X-1, or the Birmingham Northern Beltline is a proposed northern by-pass route around Birmingham, Alabama, through northern and western Jefferson County that is projected to be completed by 2054.〔 Along with the existing I-459, the Northern Beltline would complete the bypass loop of central Birmingham for all interstate traffic. The project's budget is $5.445 billion; upon completion, the Northern Beltline will be the most expensive road in Alabama's history and among the most expensive per-mile ever built in the United States.〔(【引用サイトリンク】title=Welcome to FOIS )〕 Current plans for the route have it connecting at I-459's current southern terminus in Bessemer with I-59 at approximately mile marker 147 to the northeast of Trussville near Argo. Additional studies are underway to determine the economic feasibility to continue the route from its proposed northern terminus to I-20 in the Leeds/Moody area. The route has been designated as the Appalachian Regional Commission, High Priority Corridor X-1, State Route 959 and Interstate 422. ==History== As early as the 1960s, the prospect of a complete beltway encircling Birmingham was envisioned. Although the proposal was initially dropped from the original Interstate Highway System, the completion of Birmingham's outer beltway has been speculated since the completion of I-459 in 1985. By 1989, the first federal and local funds were earmarked for a project to study the feasibility of constructing the route. In September 1993 the Birmingham Metropolitan Planning Organization made a $500,000 request from the Alabama Department of Transportation (ALDOT) for preliminary engineering of the beltline. Through the continued efforts of representative Spencer Bachus, in June 1995, the project was designated by the Federal Highway Administration as part of the National Highway System. As a result of this designation, the beltline would be eligible for federal transportation dollars. In 1997, the Environmental Protection Agency (EPA) reviewed a number of potential routes for the Birmingham Northern Beltline. They submitted comments on September 8, 1997 and recommended ALDOT select a shorter, route due to its smaller environmental impact. They also firmly recommended against the longest route, citing that the route would "disrupt streams at 14 crossings, impact over 4050 acres forested lands within the ROW, and will destroy up to 68 acres of wetlands at 114 different sites. It will also have the greatest impact on wildlife of all the alignments discussed".〔http://blackwarriorriver.org/wp-content/uploads/2013/08/EPA-Comment-Letter-9-08-97.pdf〕 This is the route that ALDOT eventually selected for the Northern Beltline. In 2000, the Northern Beltline was added to the area’s Transportation Plan, and in 2001, Senator Richard Shelby and Congressman Spencer Bachus secured $60 million to buy right of-way and do preliminary engineering for the route. In 2003, Shelby secured an additional $2 million for the continued purchasing of right-of-way. Progress continues with the purchasing of additional right-of way through the county as of 2006. In May 2009, Bachus announced in the ''Birmingham News'' that the Northern Beltline had been designated as Interstate 422. Construction started on a section near Pinson on February 24, 2014 which will connect Alabama State Route 75 and Alabama State Route 79.〔"http://blog.al.com/spotnews/2014/02/northern_beltline_construction.html"〕 This section is budgeted to cost $46 million and will be completed by fall 2016.〔(【引用サイトリンク】title=Northern Beltline's first segment under way for $46 million; efforts to keep Self Creek clean (photos, video) )〕 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「Corridor X-1」の詳細全文を読む スポンサード リンク
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