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The state highway system of the U.S. state of Virginia is a network of roads maintained by the Virginia Department of Transportation (VDOT). As of 2006, the VDOT maintains of state highways,〔(About VDOT: Virginia's Highway System ). Retrieved September 23, 2006.〕 making it the third-largest system in the United States. ==Interstate and primary highways== Interstate Highways, totaling 1118 miles (1799 km) in Virginia,〔 are freeways designated by the Federal Highway Administration and numbered by the American Association of State Highway and Transportation Officials. They are in a special class with respect to federal funding. These interstate highways are as follows: * * * and (both proposed) * * * (proposed) * Primary highways, totaling 8111 miles (13,053 km),〔 consist of U.S. Routes, designated and numbered by the American Association of State Highway and Transportation Officials, and primary state routes, designated and numbered by the VDOT. Alternate, business, and bypass bannered routes, as well as wye connections (with a ''Y'' suffix appended to the number), are all considered primary routes.〔, revised July 1, 2003〕 Primary routes are generally given numbers under 600. The two exceptions - State Route 785 and State Route 895 - are numbered as future interstate highway spurs. Roadways at many of Virginia's state institutions, such as state universities and colleges, correctional facilities, and state police headquarters, also receive primary highway designations. For example, all of the roadways within Virginia Tech's campus carry the single designation State Route 314. These roadways may or may not be signed. Other than limited access roads, most primary routes inside Virginia's independent cities are not maintained by the state, but by the city with financial assistance from the state. Some towns also choose to maintain their own streets (see below). 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「State highways in Virginia」の詳細全文を読む スポンサード リンク
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