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Port Phillip Bay Bridge, Victoria, Australia is a proposal of linking Queenscliff and Sorrento via a bridge and therefore eliminating the need of a ferry as the only way of transport across the waterway. While not a serious proposition at the moment, it has been proposed as a means of improving linkages between two of the growth areas in Victoria, Geelong and the Bellarine Peninsula on one side and the Mornington Peninsula on the other.〔(Steven, 1997, Bridges, London: Threshold Books Ltd NOEL MURPHY: Bridge too far ... maybe not November 27th, 2009 ''Geelong Advertiser'' )〕 Such a bridge would need to span a 3.4 kilometre stretch of water known as "The Rip" between Queenscliff and Portsea in order to connect the Bellarine Highway and the Mornington Peninsula Freeway. The current longest suspension bridge is the Akashi Kaikyo Bridge in Japan, with a length of its longest span of 1,991m.〔Ostrow, Steven, 1997, Bridges, London: Threshold Books Ltd〕 This would make the proposed bridge the bridge with the longest central span of any suspension bridges in the world ever, if it were to be built as a suspension bridge.〔(Transport Problem: Negotiating Port Phillip Bay ) Adapted from a first year civil engineering report – this report was an exercise in brainstorming alternatives, RMIT Engineering Faculty〕 However the shortest link being the 3.4 km route is totally out of the question as it encroaches on the highly unstable and sensitive tip of Point Nepean. From the Preliminary Proposal put forward by David Broadbent in March 1998, there were 10 possible crossing evaluated. Out of these 10 only 1 was considered to be viable. Based on this preferred crossing the Bridge would have a landfall to landfall distance of 5 km with a main span of 2.5 km. The air draft of the bridge was calculated to need 70 meters. ==References== * Mornington Peninsula and Western Port Biosphere Report, 2002, Stage 1 Nomination to Unesco, viewed 16 June 2006, http://www.parkweb.vic.gov.au/resources/ 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「Port Phillip Bay Bridge」の詳細全文を読む スポンサード リンク
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