世界第一桥：胶州湾大桥
青岛海湾大桥又称胶州湾跨海大桥，它是国家高速公路网G22青岛——兰州高速公路的起点段，是山东省 “五纵四横一环”公路网上框架的重要组成部分，是青岛市规划的胶州湾东西两岸跨海通道“一路、一桥、一隧”中的“一桥”。起自青岛主城区海尔路经红岛到黄岛，大桥全长41.58千米，投资100亿，历时4年，全长超过我国杭州湾跨海大桥与美国切萨皮克跨海大桥，是当今世界上最长的跨海大桥。大桥于2011年6月30日全线通车。是我国建桥者自行设计、施工、建造，具有独立知识产权的特大跨海大桥。中国与世界建桥史又翻开了崭新的一页。
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