 | |
| Overview | |
|---|---|
| Location | China Qinling Mountains |
| Status | Active |
| Route | G65 Baotou–Maoming Expressway |
| Start | Xi'an Chang'an District |
| End | Shangluo Town |
| Operation | |
| Work begun | March 2002 |
| Opened | 22 December 2007 |
| Technical | |
| Length | 18.040 km (11.210 mi) |
| No. of lanes | Two in each tunnel |
| Operating speed | Speed limit: 80 km/h (50 mph) |
| Highest elevation | 1026m |
| Lowest elevation | 896m |
| Width | 10.9m |
| Grade | 1.1% |
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 China.[1] It is also the fourth longest road tunnel overall in the world, after the Lærdal Tunnel in Norway, the Yamate Tunnel in Japan[1] and WestConnex in Australia. 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.[1] The cost to build the tunnel was 3.2 billion yuan (US$410 million).[1] The maximum embedded depth of the tunnel is 1640 metres below surface level.[1]