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The Northern Virginia region is served by numerous mediums of transit. Transportation in the region is overseen by the Northern Virginia Transportation Commission and the Northern Virginia Transportation Authority. == Air transportation == The area has two major airports, Ronald Reagan Washington National Airport and Washington Dulles International Airport. While flights from the older National Airport (a focus city for US Airways) are restricted for distance, frequency, and flight paths due to the proximity to federal facilities, Dulles is the region's busiest airport〔(Fact Sheet – Washington Dulles International Airport (IAD) Runway 1L/19R )〕 in both passenger loadings and aircraft movements, and the sixteenth-busiest airport〔http://www.faa.gov/news/updates/busiest_airports/index.cfm?airportType=All&year=2007〕 in the United States by takeoffs and landings in 2007. Dulles is the region's primary international gateway, serves as a hub for United Airlines, and has recently improved its low-cost carrier offerings with the addition of multiple flights by Southwest and jetBlue. Dulles is the busiest airport in the Washington metropolitan area, and second busiest airport in the larger Baltimore–Washington metropolitan area (after BWI Airport) with over 22 million passengers a year. With nearly all of the international passenger traffic in the Washington-Baltimore region, Dulles is the busiest international airport in the Mid-Atlantic outside of the New York metropolitan area.〔(【引用サイトリンク】title=U.S. International Air Passenger and Freight Statistics Report )〕 On a typical day, more than 60,000 passengers pass through Washington Dulles to and from more than 125 destinations around the world.〔〔(【引用サイトリンク】title=Air Service Maps – IAD )〕 Dulles is a major hub for United Airlines, serving as one of the airline's two primary transatlantic gateways, and is also a focus city for Frontier Airlines. Reagan National is a hub for US Airways, Reagan National's largest carrier. US Airways Shuttle has near-hourly air shuttle flights to New York LaGuardia Airport and Logan International Airport in Boston, and Delta Air Lines' Delta Shuttle has near-hourly air shuttle flights to LaGuardia. Other than 40 slot exemptions, flights into and out of DCA are not allowed to exceed 1,250 statute miles in any direction nonstop, in an effort to send air traffic to the larger but more distant Washington Dulles International Airport. In 2010 the airport served about 18.1 million passengers. Reagan National only has United States immigration and customs facilities for corporate jet traffic; the only international flights allowed to land at DCA are those from airports with U.S. Customs and Border Protection preclearance facilities. Other international passenger flights must use Dulles or Baltimore/Washington International Airport. The region is also home to the busiest regional airport in the Commonwealth: Manassas Regional Airport, which offers more private, smaller aircraft to land in the region. The airport has service to the region by being along the VRE commuter train line, and adjacent to Virginia State Route 234. 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「Transportation in Northern Virginia」の詳細全文を読む スポンサード リンク
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