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__NOTOC__ The Sitina Tunnel (alternatives ''Sitiny Tunnel'' or ''Františka Tunnel'') is a motorway tunnel in Bratislava, Slovakia on the D2 motorway at the "Lamačská cesta - Staré grunty" section. The tunnel goes under the Little Carpathians forest. It is the first two-tube tunnel in Slovakia and by its opening, the entire D2 motorway in Slovakia was completed. ==Preparation and facts== The preparation works for both the tunnel and the motorway section began in the 1990s. The route had to be chosen; there were 3 variants: * 1st variant suggested a motorway along the old road without tunnel * 2nd variant suggested a shorter tunnel * 3rd variant suggested a longer tunnel After studying all the 3 variants, the variant with a shorter tunnel was selected, mainly for environmental reasons. The tunnel from that variant is 1440 m long for the western (right) tube, and 1415 m for the eastern (left) tube.〔 The covered parts near the building of the Slovak Academy of Sciences are 206 m and 216 m long, respectively. The width of the road is 7.5 m, and features 1 m wide hard shoulders. The average gradient in the tunnel is 2.34%.〔 The maximum allowed speed will be 80 kilometres per hour (50 mph).〔 The tunnels were built using New Austrian Tunnelling method (NATM). Due to construction near built-up areas, several changes had to be made: * Relocating entrance gate to the Bratislava Zoo, to enable building of the access road * Demolishing some buildings to make way for the motorway and the objects associated with it * Rebuilding existing roads at both ends, to enable building access roads and interchanges and connecting them to the tunnel * Rebuilding some other streets * Other changes like relocation of electrical wires The planned costs of the tunnel and of the entire section are 3.5 billions SKK (app. €98.75 mill.),〔 but the final costs have risen to 4.5 billions SKK. 18% of that are paid from the state budget and the rest from a loan provided by the Japan Bank for International Cooperation (JBIC). 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「Sitina Tunnel」の詳細全文を読む スポンサード リンク
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