The Si Du River Bridge rising more than 1,600 feet in the air is the highest bridge in the World. It is a 1,222 meters long suspension bridge (24.5 meter width) crossing the valley of the Si Du River near Yesanguan in Badong County of the Hubei Province of the People's Republic of China. When this bridge opened in November 15, 2009, it was the world’s highest bridge.
The bridge has superseded the Royal Gorge Bridge and the Beipan River Guanxing Highway Bridge as the highest bridge in the world and spans a 500-meter deep valley of the Sidu River. The span is so high that Shanghai’s Oriental Pearl Tower could fit underneath it. was designed by CCSHCC Second Highway Consultants Company, Ltd. and built at a cost of approximately US$100 million.
The bridge is part of the new G50 Huyu Expressway that parallels China National Highway 318, an east-west route between Shanghai and Chongqing. The Yiwan Railway, completed in 2010 has been described as China's most difficult to build and most expensive (per km) rail line.
The bridge's design includes H-shaped towers, a truss-stiffened main span, and un suspended side spans. The Warren-type trusses were constructed in seventy one sections with the largest section weighing 91.6 metric tons and are 6.5 m (21 ft) tall and 26 meters (85 ft) wide. The main suspension cable are made of 127 parallel wire strands bundled into a hexagonal shape. Each strand is made of 127 wires and it also make a hexagonal shape so that there is a total of 16,129 wires in each of the two main suspension cables. Boats and helicopters were previously used to string the first cable, but conditions at the Si Du River Bridge's location would not allow to use these. For the first time, rocket has been used to install the first part of the suspension cable (also known as pilot cable). The first use of rockets carrying pilot cables resulted in time and cost savings.
The Si Du River Bridge is not the first Chinese bridge to attain "World's Tallest Bridge" status; two other Chinese bridges in the past decade have received the same title. This concludes that China’s transportation is developing at a substantial rate. China's highly developed transportation system correlates with its rapid advancement in becoming the new global power.