Honestly it probably would be way less safe because the network of pumps and fans and whatnot that would be needed to keep that tunnel both DRY and oxygenated would be insane. I’m also pretty sure the trains would need to be built like submarines to prevent the atmosphereic pressure from crushing them? Or maybe the tunnel? It honestly seems like an engineering nightmare.
There is no way in the name of all that is good and holy in this fucking world I’m getting in a 3000 mile tunnel under the ocean.
Would it be any less safe than flying? Probably not. But for some reason I would rather fall out of the sky and die than be crushed and drown.
Honestly it probably would be way less safe because the network of pumps and fans and whatnot that would be needed to keep that tunnel both DRY and oxygenated would be insane. I’m also pretty sure the trains would need to be built like submarines to prevent the atmosphereic pressure from crushing them? Or maybe the tunnel? It honestly seems like an engineering nightmare.