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If the thing is built underground thermal swings wont matter. Furthermore, there is definitely a large market for people that want to get between AD and Dubai

by cup 10y ago

If the thing is built underground thermal swings wont matter. Furthermore, there is definitely a large market for people that want to get between AD and Dubai in as short as possible a time. Sure, high speed rail would be great but people would be willing to pay extra to shave off 12 minutes.

lisper 10y ago
> If the thing is built underground That would make it the longest subway in the world by a factor of 3. Not going to happen.