3 17 national highway

3 17 National Highway from Chengdu, Sichuan to Naqu, Tibet.

3 17 National Highway is a national highway in China, also known as the northern line of Sichuan-Tibet Highway. The branch line of National Highway 3 18 starts in Chengdu, Sichuan and ends in Naqu, Tibet, with a mileage of 2,030 kilometers. During the "Thirteenth Five-Year Plan" period, the extension end point is Gaer County, Ali region, Tibet. National Highway 3 17 starts from Chengdu and ends at Naqu, which is a part of the north-north horizontal line of the main skeleton network of Tibet Highway.

According to the relevant person in charge, the Qamdo-Naqu section is 764 kilometers long and is the backup road of Sichuan-Tibet Highway. The Sichuan-Tibet Highway has greatly promoted Tibet's economic development and improved people's lives, changed Tibet's long-term closed appearance, and played an extremely important role in Tibet's economic construction and national defense construction.

Reconstruction of National Highway 3 17 Tuochang Highway;

Tuochang (Toba to Changdu) Highway is118km (originally 12 1 km), which is an important section of National Highway 3 17, the northern line of Sichuan-Tibet Highway, and is an important traffic artery and national defense highway. Restricted by many factors, such as the urgent demand for highway traffic in the early 1950s and the poor construction conditions.

This section has a large longitudinal slope and a long slope distance, which is an accident-prone area. It takes a day to drive normally. In the rainy and snowy season, landslides or snow often occur, which has a serious impact on driving safety. The highway reconstruction project was approved by the Ministry of Communications, with a total length of 1 10.94 km and a total construction period of 3 years. After completion, vehicles from Changdu to Chengdu via National Highway 3 17 will avoid the dangerous mountain of Damala Mountain.