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.
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”
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.
you are both right
Yes, I didn’t say they didn’t do anything, I only said “there’s an island and the waters are shallow”:)
But it’s generally cheaper to dig and cover, thatn to build in the air.