Tokyo Gate Bridge

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Tokyo Gate Bridge
東京ゲートブリッジ
Tokyo Gate Bridge and plane 2011.jpg
Tokyo Gate Bridge, April 2011
Carries Road traffic (4 lanes), pedestrians
Crosses Tokyo Bay
Locale Tokyo, Japan
Design cantilever bridge
Total length 2,618 m
Height 87.8 m
Longest span 440 m
Vertical clearance 54.6 m
Construction begin 2002
Construction end 2011
Opened 2012
Toll None
Coordinates Coordinates: 35°36′41″N 139°49′38″E / 35.61139°N 139.82722°E / 35.61139; 139.82722

Tokyo Gate Bridge (東京ゲートブリッジ Tōkyō gēto burijji?) is a truss cantilever bridge across Tokyo Bay in Kōtō, Tokyo, Japan. It opened on 12 February 2012[1][2] with an estimated total construction cost of ¥113 billion for the Stage II section of highway including the bridge.[3]

History[edit]

Part of a new four-lane highway ringing Tokyo, construction began in 2002 and was scheduled for completion in 2011, but the opening to traffic was delayed until 2012. With the provisional name of Tokyo Bay Waterfront Gate Bridge (東京港臨海大橋 Tōkyōwan rinkai ōhashi?) the public was asked for suggestions. From the 12,223 received, "Tokyo Gate Bridge" was chosen and officially announced on 15 November 2010.[4]

Design[edit]

The rather unusual design is a result of opposing requirements: to be high enough to allow large ships to pass underneath, but low enough not to interfere with air traffic to the nearby Haneda Airport. It is a double cantilever bridge, which means that the truss sections from either side can be completed in balance, and then joined by addition of the relatively short central span.[5] In effect, this bridge is a somewhat gawky deformation of a single span of the iconic Forth Bridge in Scotland. A more fanciful view, of the two sides being monsters facing off, has given it the nickname of 'Dinosaur Bridge' (恐竜橋 Kyōryū-bashi?)[6]

References[edit]

  1. ^ http://www.japantimes.co.jp/text/fv20120224ho.html
  2. ^ http://www.japantoday.com/category/national/view/tokyo-gate-bridge-opens-to-traffic
  3. ^ Official "flyer" shows Stage II including Tokyo Gate Bridge, with a budget as of November 2009 "東京港臨海道路II期事業の概要" [Tokyo Bay Waterfront Highway Stage II work overview] (pdf) (in Japanese). Japan: Ministry of Land, Infrastructure, Transport and Tourism. 2011. Retrieved 30 June 2012. 
  4. ^ "東京港臨海大橋(仮称)の名称決定について" [Official name for Tokyo Bay waterfront bridge]. News Release (in Japanese). Japan: Tokyo Metropolitan Government. 15 November 2010. Retrieved 30 June 2012. 
  5. ^ Official "flyer" updated with the top photo showing the central span being added. At the bottom is an illustration of the constraints from air and sea. "【最新版】TGBチラシ_H23.3.3_" [Tokyo Gate Bridge latest update 3 Mar 2011] (pdf) (in Japanese). Japan: Ministry of Land, Infrastructure, Transport and Tourism. 2011. Retrieved 6 June 2011. 
  6. ^ Cooper, Chris, and Kiyotaka Matsuda, "'Dinosaur Bridge' leads Tokyo push to ease traffic and boost economy", (appeared in the Japan Times, 12 February 2012, p. 2.)

External links[edit]