The 26-mile Jiaozhou Bay Bridge. (Photo taken Wednesday and released by China's Xinhua news agency.) Yan Runbo/AP hide caption itoggle caption Yan Runbo/AP The Two-Way China Opens World's Longest Bridge. Would You Cross It? June 30, 2011 At more than 26 miles, the Jiaozhou Bay bridge is about two miles longer than Louisiana's Lake Pontchartrain Causeway.