Driving on the YaXi Expressway - costing 100m rmb per km, crossing 12 earthquake zones - 4K

Ya'an-Xichang Expressway Driving Tour - China's First Expressway with Double Helix Tunnels - 4K
Ya'an-Xichang Expressway, as China's first expressway with double helix tunnels, not only demonstrates China's outstanding achievements in expressway construction under complex terrain, but also provides driving enthusiasts with unique driving pleasure.
1. Overview of Ya'an-Xichang Expressway:
Ya'an-Xichang Expressway is an important transportation trunk line connecting Ya'an City and Xichang City in Sichuan Province, with a total length of about 240 kilometers. This expressway crosses the climbing zone from the Sichuan Basin to the Hengduan Mountain Area, hovering between the mountains, and passes through large and small mountains through viaducts and tunnels, crossing multiple water systems such as the Dadu River and the Anning River and 12 earthquake fault zones. There are 270 bridges and 25 tunnels along the entire line, with a bridge-tunnel ratio of up to 55%. It is recognized by domestic and foreign experts as one of the mountain expressways with the worst natural environment, the most difficult engineering, and the highest technological content in the world.
2. The miracle of the double helix tunnel:
The most eye-catching thing about the Ya'an-Xichang Expressway is its unique double helix tunnel design. In the section from Tuowu Mountain to Shimian, in order to overcome the problems of large height difference and poor geological conditions, engineers cleverly designed two double helix tunnels, Ganhaizi Tunnel and Tiezhaizi No. 1 Tunnel. These two tunnels effectively reduced the road slope of the highway by spiraling 360 degrees in situ, solving the problem of large drop. The design of the double helix tunnel not only demonstrated the wisdom and courage of the engineers, but also became a miracle in the history of world highways.
3. Driving experience:
Driving on the Ya'an-Xichang Expressway, you will pass through the misty mountains, as if you were in a flowing landscape painting. As the altitude gradually increases, the scenery along the way will also change dramatically, from the primitive forest at the entrance of the Daxiangling Tunnel, to the Dadu River Canyon in Hanyuan, to the plateau scenery in Mianning and Xichang, each one is unforgettable.
Driving in a double helix tunnel is an unprecedented experience. As the vehicle slowly rises, you will find yourself in a huge spiral, with the surrounding mountains and trees constantly rotating in your sight. This unique driving experience will undoubtedly make your trip to the Ya'an-Xichang Expressway more memorable.
4. Safety Tips:
Although the driving experience of the Ya'an-Xichang Expressway is extremely unique, safety always comes first. During driving, please pay attention to road conditions and weather changes, keep a moderate speed, and avoid driving while tired. Especially when driving on complex sections such as the double helix tunnel, you must be more vigilant to ensure driving safety.
5. Summary:
The Ya'an-Xichang Expressway driving trip is not only a journey of exploration of natural scenery, but also a journey of witnessing human wisdom and courage. On this cloud highway, you will experience unprecedented driving pleasure and a shocking visual experience. If you are a driving enthusiast, then the Ya'an-Xichang Expressway is definitely worth your visit.
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