When Sweden and Denmark built a connection between their countries, Sweden preferred a bridge, and Denmark preferred a tunnel, they each built their half and connected them in the middle with an artificial island. The Øresund Bridge is unique in the world.

  • mercano@lemmy.world
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    1 year ago

    There’s one in Virginia, the Chesapeake Bay Bridge Tunnel. There are two tunnels segments to go under major shipping channels. There are major naval bases upstream, and it was considered a national security risk to have a fleet potential trapped behind a downed bridge.

  • Diddlydee@feddit.uk
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    1 year ago

    That’s nothing. There’s a magic farmer near me. His tractor turns into a field.

  • toofpic@lemmy.world
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    1 year ago

    It’s not like Denmark “preferred” a tunnel, it’s just there is an island and waters are shallow, so they didn’t need to go all-out “hammer supports in the sea”

    • goldenbug@fedia.io
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      1 year ago

      IIRC the Island is artificial and the reason a tunnel was made was because the entry point would be too close to the airport, endangering the airport and the bridge.

  • Onomatopoeia@lemmy.cafe
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    1 year ago

    I do not think that word means what you think it means.

    There’s been a bridge/tunnel in Virginia since the 60’s, crossing the mouth of the Chesapeake bay where it opens to the Atlantic.

  • BarqsHasBite@lemmy.world
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    1 year ago

    The justification for the additional expenditure and complexity related to digging a tunnel for part of the way, rather than raising that section of the bridge, was to avoid interfering with air traffic from the nearby Copenhagen Airport, to provide a clear channel for ships in good weather or bad, and to prevent ice floes from blocking the strait. The bridge received the 2002 IABSE Outstanding Structure Award.