All Questions
Tagged with construction transportation
3
questions
25
votes
2
answers
6k
views
What is the oldest road tunnel in the world?
At the Furlo Pass in the Apennines, the Via Flaminia passes through a tunnel built in 76 - 77 AD during the time of Emperor Vespasian, replacing an earlier tunnel.
The tunnel built during the time of ...
- 107k
59
votes
9
answers
25k
views
Why are so many metros underground? Isn't that more expensive than an elevated system?
Starting with the London Underground in 1863, why are so many metros/subways built underground (as opposed to en elevated metro)? This requires a lot of digging and excavation, which to me seems a lot ...
- 17.2k
5
votes
1
answer
3k
views
Construction of the Great Cothon of Carthage
I'm fascinated by the Great Cothon of Carthage, but when I try to learn more about it online, there's surprisingly little information. Everyone has physical descriptions of the size and shape, but ...
- 7,712