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1 vote

How many miles/km of tunnels would be required to replace all airports in the world

Approximation I presume that something that resembles a train network rather then lots of direct routes. Eg Berlin to Chicago would Likely involve a route that would include London perhaps Toronto. ...
Gault Drakkor's user avatar
0 votes

What would remain of human constructs after ~3000 years?

It depends. In naturally dry areas, your structures might survive for millenia. If you have a area, that is naturally poor regarding moisture and rain, you can keep mumies and structures for long time....
Pica's user avatar
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0 votes

What would remain of human constructs after ~3000 years?

The Pyramids lasted 5000. The Parthanon 2,500 Contemporary structures, 100 years average. The dead sea scrolls lasted because they were stored in a dry salt cave. Stone, lime mortar, clay fired bricks ...
LazyReader's user avatar
4 votes

How many miles/km of tunnels would be required to replace all airports in the world

That depends on the traffic patterns. If I were to travel from Hennigsdorf, Brandenburg, Germany to Randolph, New Jersey, USA, I might take a tram to the train station, a regional train to the airport,...
o.m.'s user avatar
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7 votes

How many miles/km of tunnels would be required to replace all airports in the world

This is a Frame Challenge The only way for this to make any sense is for the tunnels to allow faster and more convenient transport than the equivalent airborne transport. Unfortunately, we must assume ...
JBH's user avatar
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