Siduhe translates to Four Crossings River. "Si" means four while "du" means crossings and "he" means river. The name probably came from the Red Army's famous Four Crossings of the Chishui River in Guizhou Province during Chairman Mat Tse Tung's Long March in 1935.
With a roadway 1,627 feet (496 mtrs) above the water, the Siduhe River bridge is the latest Chinese champ to take the record as the highest bridge in the world. Opened on November 15th, 2009, it is the 3rd Chinese bridge in less than a decade to claim the title of "World's Highest Bridge" and is a symbol of just how fast and how far China's highway infrastructure has come in such a short period of time.
It would only be appropriate that the highest bridge in the world is also on the greatest bridge "high-way" in the world. Stretching 300 miles (483 km) from Yichang and the 3 Gorges dam in the east to the city of Zhongxian in the west, this 4-lane engineering marvel has more than half a dozen spectacular bridges that exceed 500 feet (150 meters) in height including Zhijinghe, the highest roadway arch bridge in the world. This more direct route bypasses one of the toughest and most mountainous stretches of the Yangtze River. What once took more than a day of travel on dangerous mountain roads or a Yangtze river boat can now be safely traversed in 5 hours.
Located about 50 miles (80 km) south of the famous Three Gorges region of the Yangtze River in China's mountainous Hubei Province, the Siduhe suspension bridge is just one of several amazing structures on the last 300 mile (483 km) link of the 1,350 mile (2,175 km) long West Hurong highway that now connects Shanghai on the Pacific coast with the cities of Chongqing and Chengdu in the west.
Siduhe is so high that its closest rival in Mexico is over 100 meters lower. It is 672 feet (205 meters) higher than Colorado's Royal Gorge bridge. The structure also has the unique distinction of being the only bridge in the world where a person falling from the deck can reach terminal velocity - the speed at which a falling object will no longer accelerate. With so many unprecedented superlatives, the Siduhe River bridge is unlikely to lose its lofty height record for sometime to come.