Golden Gate Bridge to a site near the bridge. In May 1987, as part of the 50th anniversary celebration, the Golden Gate Bridge district again closed the bridge to automobile traffic and allowed pedestrians to cross the bridge. However, this celebration attracted 750,000 to 1,000,000 people, and ineffective crowd control meant the bridge became congested with roughly 300,000 people, causing the center span of the bridge to flatten out under the weight. Although the bridge is designed to flex in that way under heavy loads, and was estimated not to have exceeded 40% of the yielding stress of the suspension cables, bridge officials
Sky Gate Bridge R Sky Gate Bridge R , serving the Kansai International Airport of Osaka, Japan, is the longest double-decked truss bridge in the world. It carries six lanes of automobile traffic on top and two of rail below, over nine truss spans. It links the mainland to the artificial island on which the airport is built. The Sky Gate Bridge is a continuous truss bridge that measures 3,750 meters long, 29.5 meters wide (6 lanes), and 25 meters at its highest point in the center. The bridge commenced construction in June 1987, and was completed in March 1994. The bridge was damaged