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It is the deepest railway tunnel in the world, with a maximum depth of 2,450 m (8,040 ft), [5] comparable to that of the deepest mines on Earth. Without ventilation, the temperature inside the mountain reaches 46 °C (115 °F).
Will be the longest road tunnel in the world, and also the deepest undersea tunnel, 392 metres (1,286 ft) below sea level. It will also have a 4,100 m (2.548 mi) connection tunnel from Kvitsøy to the main tunnel. Railway Sasson Tunnel [citation needed] Hokkaido, Japan 26,230 m (16.299 mi) [citation needed] 2031 Part of the Hokkaido Shinkansen.
The tunnel is 7,765 metres (25,476 ft) long and reaches a depth of 287 metres (942 ft) below sea level, and was the deepest undersea tunnel in the world until Norway's Rogaland county opened its 292 m (958 ft) deep Ryfast tunnel system in December 2019.
Hiyoshi Tunnel [71] Japan 14.532 km (9.0 mi) 2027 Chūō Shinkansen Linjiashan Tunnel China 14.530 km (9.029 mi) 2026 Xi'an-Ankang HSR: Yujialiang Tunnel Shaanxi: 14.504 km (9.012 mi) 2028 Chongqing-Xi'an High Speed Railway: Nanjing South Station Tunnel China 14.442 km (8.974 mi) 2026 Nanjing-Wuhu Railway
At long last, the world?s longest?and deepest?tunnel lives in Switzerland.
Norway has revealed plans to build the world’s longest and deepest underwater tunnel to cut 11 hours from the journey on its E39 coastal highway. The 16.5-mile tunnel, known as Rogfast, will ...
The tunnel, which will be 18 kilometers (11.1 miles) long, is one of Europe’s largest infrastructure projects, with a construction budget of over 7 billion euros ($7.1 billion).
The tunnel is part of the Ryfast project. It is 14.4 kilometres (8.9 mi) long [ 2 ] and is currently the world's longest subsea road tunnel, and the deepest tunnel of any kind. Both records are expected to be surpassed by Rogfast , which is projected to open in 2033.