Zhongnanshan-Tunnel

The Zhongnanshan Tunnel ( Chinese秦岭 终 南山 公路 隧道, Pinyin Qínlǐng Zhongnanshan Lùsuìdào ) is a built between 2002 and 2007 and 18 km long highway tunnel in the People's Republic of China.

He is part of the highway between Xi'an and Ankang in the south of the central Chinese province of Shaanxi. The tunnel passes under the Qin Ling Mountains in the area of ​​Zhongnanshan and connects the catchment area of the Yellow River in the northern part of China with the Yangtze River in the south of the country.

The plans for the Zhongnanshan tunnel began in the 1990s, construction began March 2002. On January 20, 2007, two years earlier than planned, which consists of two tubes building was opened. The construction costs amounted to 330 million euros.

With exactly 18,020 meters of Zhongnanshan tunnel is the longest highway tunnel and after Lærdalstunnelen in Norway 's second longest road tunnel in the world. At a length of about 4 km, it is more than 1000 m below the surface of Zhongnanshan, the maximum depth is 1640 m. The tunnel has three ventilation shafts.