Where is the longest tunnel in China?

The longest tunnel is in Zhong Nanshan, Qinling Mountain, Shaanxi Province.

The longest tunnel in China is Zhongnanshan Tunnel in Qinling Mountains, which is located in Shaanxi Province. 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 total length of the line is 18.02km, and the pavement is two-hole four-lane one-way two-lane, with a design speed of 80km/h. ..

Zhongnanshan Tunnel in Qinling Mountains is a straight line, roughly arranged in the north-south direction. There is a herringbone longitudinal slope and two variable slope sections in the tunnel. The cross section is a three-center circular curve wall contour. The pavement in the tunnel is paved with concrete, and the lining is designed as a composite lining in combination with geological conditions. Besides the surrounding rock section at the entrance and exit and the fan suspension section, the main tunnel is provided with ventilation shafts.

Matters needing attention in tunnel tourism

1. Whether on the highway or on the urban road, when we drive into the tunnel, we should keep enough distance from the car in front and reserve enough avoidance space for ourselves.

2. When driving out of the tunnel, the driver's eyes may have a white hole effect. At this time, special attention should be paid not to accelerate in a hurry to avoid catching up with the local train ahead.

3. Under normal circumstances, the lanes in the tunnel are all drawn with white single solid lines, which also means that lane changes are not allowed in the tunnel.

Although vehicles are not allowed to change lanes in the tunnel, there are always some unruly drivers who use solid lines to change lanes in the tunnel. At this time, we should not only regulate our driving behavior, but also guard against these illegal vehicles to avoid losses.