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· ~ Mysterious Entity ~
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5,289 Posts
Both. The distance is quite wide, and there are a couple islands that would allow part of the crossing to be bridge while part would be tunnel.
 

· ~ Mysterious Entity ~
Joined
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5,289 Posts
you mean like L-H Lafontaine bridge/tunnel? Is it cheaper?
Underwater tunnels are always more expensive than bridges, but having a shorter tunnel section augmented by a bridge would certainly be cheaper than a tunnel for the full width.
 
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