The 5.1-kilometer underwater tunnel built in Dalian, China's port city, has opened to traffic. The six-lane highway, constructed by submerging massive concrete tubes, has reduced travel time between the two sides of the bay from one hour to five minutes.
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The 5.1-kilometer underwater tunnel built in Dalian, China's port city, has opened to traffic. The six-lane highway, constructed by submerging massive concrete tubes, has reduced travel time between the two sides of the bay from one hour to five minutes.