The 5.1-kilometer long tunnel is made up of 18 large immersed tubes, with its tube section measuring 3,035 meters.
When completed, the tunnel will have six traffic lanes in both directions, with a design speed of 60 kilometers per hour.
The new tunnel is expected to relieve traffic pressure, optimize urban development and promote the integration of Dalian Bay after it’s completed.
The Dalian Bay undersea tunnel in northeast China's Liaoning Province completed tube installation Friday midnight.
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