Caiyuanba Bridge, Multi-level road and rail bridge across Yangtze River in Chongqing, China

Caiyuanba Bridge is a multi-level steel structure that carries both motor vehicles and trains across the Yangtze River in Chongqing. The bridge integrates six traffic lanes and two railway tracks for rail transit, all stacked within its design to serve multiple forms of transport simultaneously.

Work on the Caiyuanba Bridge began in late 2003, the arch closed on 27 March 2007, and the bridge opened to traffic on 29 October 2007. It was the seventh bridge across the Yangtze in central Chongqing and the first there to carry both road traffic and rail transit.

The bridge's name comes from Caiyuanba, the Yuzhong District area at its northern end, where Chongqing Railway Station stands. Its southern approach runs through the Sujiaba interchange, whose spiral ramp, about 72 metres above ground on slender piers, is cited as a symbol of Chongqing's "8D" terrain and gives drivers a roller-coaster-like view.

The bridge deck sits 114 metres above the Yangtze, the highest road surface on the river. At the north end, the 97-metre Sujiaba interchange splits into three levels: one runs to Lianglukou, one spirals down to the Caiyuanba tunnel and Caiyuan Expressway, and one loops three times to Chongqing railway station. The south ramp is a spiral about 72 metres high, China's tallest urban interchange ramp.

The bridge deck stands 114 metres above the Yangtze, the highest deck of any bridge on the river. At the southern end, the Sujiaba interchange's spiral ramp rises about 72 metres on slender piers, the tallest urban interchange ramp in China, and drivers compare the loop to a roller coaster.