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Old October 13th, 2007, 05:47 AM   #221
wyqtor
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Quote:
Originally Posted by GENIUS LOCI View Post
This is a current project for central Milan: a road tunnels web
Big Dig in Milano???
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Old November 30th, 2007, 06:02 PM   #222
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Underground motorways?

Are there any highway that goes underground for several miles and that thanks to this escamotage are able to reach the very center of cities?
do you know any?I'm wanderin...
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Old November 30th, 2007, 08:40 PM   #223
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Boston's Big Dig?
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Old November 30th, 2007, 10:15 PM   #224
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Madrid M30 (Spain)
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Old November 30th, 2007, 10:23 PM   #225
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There's the Ville Marie in downtown Montreal.
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Old November 30th, 2007, 10:24 PM   #226
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I believe Montreal has an underground highway through its downtown. Not 100% sure though.
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You are genius too Electrify, never would have thought of this if not for your thread.
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Old November 30th, 2007, 10:49 PM   #227
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Sydney has the Cross City Tunnel and Eastern Distributor.





Eastern entrance - a tunnel above a tunnel



Traffic coming to the surface on an exit ramp

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Old November 30th, 2007, 11:59 PM   #228
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A tour of Boston's underground expressways:








Last edited by Paddington; December 1st, 2007 at 12:09 AM.
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Old December 1st, 2007, 12:21 AM   #229
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The Ronda del Litoral (B-10) in Barcelona is partially underground, it is usually at level -1, and features a lot of tunnels. The Ronda de Dalt (B-20) also features a lot of tunnels, and is also often at level -1. Barcelona shows an extensive motorway network doesn't have to destroy a city's atmosphere. Also, the Avinguda Gran Via, which is partially a motorway/expressway is evidence of this.
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Old December 1st, 2007, 12:27 AM   #230
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The A96 passing through Munich is underground, quite a long tunnel there, you notice nothing of Munich because of it, after that Tunnel you have the choise to go into the Alps or leave the A8 which the A96 aktually is and go on the Passau Autobahn.
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Old December 1st, 2007, 12:29 AM   #231
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The Netherlands only have some rivercrossings via a tunnel. underground motorways don't really exist, only they are sometimes diving under a building on the A10 in Amsterdam or the A12 in The Hague.
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Old December 1st, 2007, 12:46 AM   #232
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Berlin just built one that goes right underneath the German Parliament in the center of downtown.
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Old December 1st, 2007, 12:58 AM   #233
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In Oslo we have the Festningstunnel "Fortress Tunnel" which goes under the city (and harbor). This is a typical bored tunnel.

Work is well underway on extending the tunnel under the Bjørvika harbor further east. Due to the difficult geological qualities of the area they're building a submerged floating tunnel. I don't understand the bouyancy ideas behind it but they claim it will work. Submerging the freeway in that area will open up a lot of valuable waterfront real estate.
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Old December 1st, 2007, 01:03 AM   #234
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submerged floating tunnels, are those used anywhere else? The idea sounds interesting, it's a good way to let ships pass, but you don't have to cross all the way under a fjord, which can be several hundreds meters deep. Some kind of "bridge" under water.
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Old December 1st, 2007, 07:37 AM   #235
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New York City has several tunnels that cross the rivers, such as the Holland Tunnel, the Battery Tunnel, and a few others, reaching around 3000 m in length.
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Old December 1st, 2007, 11:11 AM   #236
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how about Plabutschtunnel at A9, Graz, Austria? i'm not sure what is above it, but definitely not some mountain that requires 10 km long tunnel
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Old December 1st, 2007, 12:37 PM   #237
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How does a floating tunnel work?
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Old December 1st, 2007, 02:47 PM   #238
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Dublin port tunnel, 4.5km of twin bore tunnel under city.

Last edited by ardmacha; December 1st, 2007 at 03:32 PM.
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Old December 1st, 2007, 09:06 PM   #239
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Boston's Big Dig



It was the most expensive highway project in US History: $14.6 billion. And it was tainted with corruption and shoddy workmanship that caused the death of an innocent passenger (thanks to tunnel leaks ), but it is a nice highway, and replaced this monstrosity, the overcrowded Central Artery, which cut off the city from the harbor. It's been replaced with parks and greenery:



The bridge that spanned the Charles River north of Downtown was also demolished too. It was a really ugly bridge, and was replaced with this cable-stayed bridge, the Zakim Bridge (during construction, the old bridge is the right.) It's a beautiful bridge that's become a new landmark in Beantown.

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Old December 1st, 2007, 09:10 PM   #240
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Very interesting, reminds me of Toronto's controversy over the Gardiner expressway, which also cuts off Toronto from the shoreline. However, the city doesn't have money to bury it or create a cable-stayed bridge (here is one proposal, www.toviaduct.com).
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