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Zhongnanshan Tunnel, or Qinling Zhongnanshan Tunnel (Chinese: 秦岭终南山公路隧道) in Shaanxi Province, China, is the longest two-tube road tunnel in the world. It is also the second longest road tunnel overall in the world, after the Lærdal Tunnel in Norway. The 18,040-metre (11.21 mi) long tunnel, crosses under the Zhongnan Mountain (Zhongnanshan) . It opened on 20 January 2007, becoming part of the Xi'an-Ankang Highway between the Changan and Zhashui counties. The cost to build the tunnel was 3.2 billion yuan (US$410 million).

The maximum embedded depth of the tunnel is 1640 metres below surface level.

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