|
The Vasco da Gama Bridge ((ポルトガル語:Ponte Vasco da Gama); ) is a cable-stayed bridge flanked by viaducts and rangeviews that spans the Tagus River in Parque das Nações in Lisbon, capital of Portugal. It is the longest bridge in Europe (including viaducts),〔http://news.bbc.co.uk/2/hi/europe/71214.stm〕 with a total length of , including for the main bridge, in viaducts, and in dedicated access roads. Its purpose is to alleviate the congestion on Lisbon's other bridge (25 de Abril Bridge), and to join previously unconnected motorways radiating from Lisbon. Construction began on February 1995; the bridge was opened to traffic on 29 March 1998, just in time for Expo 98, the World's Fair that celebrated the 500th anniversary of the discovery by Vasco da Gama of the sea route from Europe to India. ==Description== The bridge carries six road lanes, with a speed limit of , the same as motorways, except on one section which is limited to . On windy, rainy, and foggy days, the speed limit is reduced to . The number of road lanes will be enlarged to eight when traffic reaches a daily average of 52,000. ;Bridge sections #North access roads #North viaduct - #Expo viaduct - ; 12 sections #Main bridge - main span: ; side spans: each (total length: ); cement pillars: -high; free height for navigation in high tides: ; #Central viaduct - ; 80 pre-fabricated sections -long; 81 pillars up to -deep; height from to #South viaduct - ; sections; 84 sections; 85 pillars #South access roads - ; includes the toll plaza (18 gates) and two service areas 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「Vasco da Gama Bridge」の詳細全文を読む スポンサード リンク
|