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The 14th Street Bridge is a complex of five bridges across the Potomac River, connecting Arlington, Virginia, with Washington, D.C. A major gateway for automotive and rail traffic, the complex is named for 14th Street (U.S. 1), which feeds into it on the D.C. end. It includes three four-lane automobile bridges—one northbound, one southbound, and one bi-directional — that carry Interstate 395 and U.S. Route 1 traffic.〔(【引用サイトリンク】title=Virginia Freeway HOV Lanes )〕 One rail bridge carries the Yellow Line of the Washington Metro; the other, the only mainline rail crossing of the Potomac River in Virginia, carries a CSX Transportation rail line. At the north end of the bridge, in East Potomac Park, the three roadways feed into a pair of two-way bridges over the Washington Channel into downtown Washington, one carrying traffic (including northbound U.S. 1) north onto 14th Street, and the other carrying I-395 traffic onto the Southwest Freeway. The Metro line enters a tunnel in the East Potomac Park, and the main line railroad from the Long Bridge passes over I-395 and runs over the Washington Channel just downstream of the 14th Street approach before turning northeast along the line of Maryland Avenue. The original bridge ran to the junction of 14th Street and Maryland Avenue, with access to either for cars. One of the road bridges was struck by Air Florida Flight 90 when it crashed on January 13, 1982. ==Bridges== Each of the complex's five bridge spans has its own name. From south to north, the bridges are: * The 1903 (rebuilt v1943) Long Bridge carries CSX, Amtrak and Virginia Railway Express rail traffic over the river. The name "seems to have been derived from its planned size and not as a memorial to any particular individual." * The 1983 Charles R. Fenwick Bridge—named for the Virginia state senator who helped create the Washington Metropolitan Area Transit Authority—carries the Yellow Line of the Washington Metro across the river. * The northbound span, which opened in 1950, was originally named the Rochambeau Bridge, and was renamed the Arland D. Williams Jr. Memorial Bridge in 1983 for a passenger of Air Florida Flight 90 who died saving others from the freezing water. * At that time, the Rochambeau Bridge name was moved to the previously unnamed center bridge, which opened in 1972 and carries traffic in both directions. * The southbound span, opened in 1962, is named the George Mason Memorial Bridge. A footpath is on the upstream side of the bridge for pedestrians and cyclists. 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「14th Street Bridge (Potomac River)」の詳細全文を読む スポンサード リンク
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