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Old June 20th, 2017, 11:01 PM   #1
Subway Dave
Join Date: May 2004
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MISC | Subway Costs

I have a technical question. Does it cost more, less or is it the same to build a subway under a densely residential area as it does under a downtown where there are lots of skyscrapers?

Last edited by dimlys1994; June 21st, 2017 at 07:09 AM.
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Old June 21st, 2017, 04:11 PM   #2
The Polman
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I don't know in which environment that would be, but in Europe digging in a suburb is easier than in the inner city. This is because of the complex underground infrastructure which is a labyrinth even for experts as it isn't mapped nor has been maintained for decades in some cases. Also, the buildings are much older and also they have their peculiar structures under the ground, like rotten wooden poles in the boggy soil of Amsterdam or the foundations of an ancient Roman building in Rome. In the first case some houses sunk (Vijzelgracht incident), the second repeatedly delayed the Metro C opening.

But with skyscrapers: also depends how they are built. If they are far enough from a wide road it must be quite easy actually (much better than a historical downtown). Along wide Asian Boulevards it's easy (guess why Shanghai's system grew like bamboo). Dense neighbourhoods: well, still very hard in Amsterdam, while with more solid soil and wider streets it is easier. Being able to place the station in a bored tunnel can save space above ground.
Relieving the pressure on Dutch housing market: we need more apartments and taller apartment buildings, no single-family dwellings anymore!

Prohibit the construction of new single-family dwellings without stacking apartments in Amsterdam (A10), Rotterdam (motorway ring), The Hague, Utrecht (outer ring), Eindhoven (ring), Tilburg (ringbanen) and Groningen (provincial ring)!

And prohibit the use of agricultural land for new dwellings!

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Old June 22nd, 2017, 03:46 PM   #3
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The "cut-and-cover" method is tried and true.

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