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The Triborough Bridge, known officially as the Robert F. Kennedy Bridge since 2008, and sometimes referred to as the RFK Triborough Bridge, is a complex of three separate bridges〔 in New York City. The bridges connect the boroughs of Manhattan, Queens, and the Bronx via Randalls and Wards Islands, which are joined by landfill. The bridge complex, which carries Interstate 278 and unmarked New York State Route 900G, connects with the FDR Drive and the Harlem River Drive in Manhattan, the Bruckner Expressway and the Major Deegan Expressway in the Bronx, and the Grand Central Parkway and Astoria Boulevard in Queens. The three bridges of the Triborough Bridge complex are:〔(Robert F. Kennedy Bridge ), Metropolitan Transportation Authority. Accessed November 3, 2015. "The Robert F. Kennedy Bridge (formerly the Triborough Bridge), the authority's flagship facility, opened in 1936. It is actually three bridges, a viaduct, and 14 miles of approach roads connecting Manhattan, Queens, and the Bronx."〕 * the Harlem River vertical-lift bridge, the largest in the world, which connects Manhattan to Randall's Island; * the Bronx Kill truss bridge, connecting Randall's Island and the Bronx; * the suspension bridge over Hell Gate – a strait of the East River – which connects Ward's Island to Astoria in Queens. These are connected by an elevated highway viaduct across Randall's and Ward's Islands and of support roads.〔〔 Also part of the complex is a grade-separated T-interchange on Randall's Island, which sorts out traffic in a way that ensures that drivers pay a toll at only one bank of toll booths.〔 The bridge complex was designed by chief engineer Othmar H. Ammann and architect Aymar Embury II,〔Shanor, Rebecca Read. "Robert F. Kennedy Memorial Bridge (Bridge )" in , p.1110〕 and has been called the "biggest traffic machine ever built".〔 The American Society of Civil Engineers designated the Triborough Bridge Project as a National Historic Civil Engineering Landmark in 1986.〔(【引用サイトリンク】title=Robert F. Kennedy Memorial Bridge )〕 The bridge is owned and operated by the MTA Bridges and Tunnels, the successor to the Triborough Bridge and Tunnel Authority, and is part of the Metropolitan Transportation Authority. ==History== 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「Triborough Bridge」の詳細全文を読む スポンサード リンク
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