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List of business routes of the Interstate Highway System : ウィキペディア英語版 | List of business routes of the Interstate Highway System
The Interstate Highway System of the United States, in addition to being a network of freeways, also includes a number of Business Routes assigned by the American Association of State Highway and Transportation Officials. The routes are signed with green shields resembling the Interstate Highway shield. The word BUSINESS is used instead of INTERSTATE, and, above the number, where the state name is sometimes included, the word LOOP or SPUR appears. A business loop has both ends as its "parent", while a business spur has a "dangling end", sometimes running from the end of the Interstate to the downtown area. As the main purpose of a Business Interstate is to serve a downtown area, it is typically routed on surface roads. Thus Business Interstates do not meet Interstate Highway standards. AASHTO does, however, apply similar standards as to new U.S. Routes, requiring a new Business Interstate to meet certain design standards.〔AASHTO, (Report of the Standing Committee on U.S. Route Numbering to the Standing Committee on Highways ), November 15, 1997〕 Business Interstates are also sometimes routed onto freeways that were once designated as mainline Interstates themselves (such as Interstate 40 Business in Winston-Salem, North Carolina and Interstate 80 Business in Sacramento, California). Unlike 3-digit Interstate spurs, business Interstates can be repeated in the same state. ==List of Business Routes==
{| class="wikitable" !Route !Cities !Status |- !colspan=3|
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「List of business routes of the Interstate Highway System」の詳細全文を読む
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