What is the longest highway tunnel in the world?

The first place is Zhong Nanshan Highway Tunnel in Qinling Mountain, Shaanxi Province, China, with a length of18.02km; Qinling Zhong Nanshan Highway Tunnel is a mountain-crossing passage connecting Xi City and Shangluo City in Shaanxi Province, China. It is located in the Zhong Nanshan Mountains of Qinling Mountains and is a part of Baomao Expressway? .

Qinling Zhong Nanshan Highway Tunnel started construction on October 8th, 2006, and was completed and put into operation on October 20th, 2007? .

Qinling Zhong Nanshan Highway Tunnel starts from Qinghua Village, Wutai Street, Chang 'an District, Xi in the north and ends at Xiaoyukou, Yingpan Town, Zhashui County, Shangluo City in the south. The pavement is two holes, four lanes and one direction, with a design speed of 80 km/h and a total investment of 4.027 billion yuan.

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The completion and opening to traffic of Qinling Zhong Nanshan Highway Tunnel has facilitated people to travel safely and quickly, saved transportation costs, and is of great significance to promoting the implementation of the strategy of developing the western region and the economic exchanges between Shaanxi Province and neighboring provinces and cities.

As the longest two-hole one-way highway tunnel designed and built by China in the world, people can drive 15 minutes to cross the natural barrier in Qinling Mountains.

China's engineers and technicians have created a world-class project for more than four years and nine months, turning the Qinling natural graben, the north-south boundary line of China, into a thoroughfare.

References:

Baidu Encyclopedia-Qinling Zhong Nanshan Highway Tunnel