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Old December 7th, 2005, 04:15 AM   #61
greg_christine
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Elevated highways were built in many US cities during the 1950's and 1960's. Now many cities are seeking to remove them.

Boston had the Central Artery, officially known as the "John F. Fitzgerald Expressway". It was replaced with the "Big Dig" tunnel project:



Oakland, California had the elevated portion of the Nimitz Freeway known as the "Cypress Structure". It collapsed during the 1989 Loma Prieta earthquake resulting in 42 deaths. It has not been replaced:



The same earthquake led to a decision to close and demolish San Francisco's elevated Embarcadero Freeway. The following picture was taken during the demolition. It has not been replaced:



Seattle has the Alaskan Way Viaduct. It was damaged in the 2001 Nisqually earthquake but is still open to traffic. The favored plan is to replace it with a tunnel:

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Old December 9th, 2005, 01:55 AM   #62
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Quote:
Originally Posted by greg_christine
Oakland, California had the elevated portion of the Nimitz Freeway known as the "Cypress Structure". It collapsed during the 1989 Loma Prieta earthquake resulting in 42 deaths. It has not been replaced:

Not true... it has been replaced by an elevated but not double-decked highway as was the original cypress. Here are some photos from the new structure which has only been open about 5 to 7 years.



Where it meets I-80:


Quote:
Originally Posted by greg_christine
The same earthquake led to a decision to close and demolish San Francisco's elevated Embarcadero Freeway. The following picture was taken during the demolition. It has not been replaced:

Good riddance... it has been replaced by this beautiful promenade.



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Old December 10th, 2005, 03:03 PM   #63
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Quote:
Originally Posted by thunder head
yeah it's called the Burnley Tunnel and was completed in 1999 as part of the citylink motorway project. I just checked the facts and it's actually 3400m long, and is 3 lanes.

That's the Domain tunnel.

The Burnley tunnel runs in the opposite direction and is twice as long and is part of the same project. It's like this so they can convert the existing elevated freeway into 3 lanes inbound and one lane outbound.


Currently under construction as part of the EastLink project are another pair of tunnels.
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Old December 19th, 2005, 04:37 AM   #64
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Quote:
Originally Posted by Toadman
Brisbane Lord Mayor Campbell N-e-w-m-a-n came out with a big plan, TransApex in the election campaign last year to build five road tunnels under Brisbane.

The North-South Bypass Tunnel(5.4Km--Under Construction)
The Airport Link(6Km--Initial Planning)
Northern Link(4.7Km--No Progress)
East-West Link(6.4Km--Unlikely to be built)
Total: 22.5Km

Brisbane's only existing significant tunnel: Inner City By-Pass(400m)
So what the heck is all this projected to cost? And where is the money coming from?

Last edited by Nouvellecosse; December 19th, 2005 at 09:26 AM.
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Old December 19th, 2005, 09:25 AM   #65
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Quote:
Originally Posted by snot
Can this call "tunnel"? I can only call it an underpass!
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Old December 19th, 2005, 09:43 AM   #66
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Quote:
Originally Posted by Nouvellecosse
So what the heck is all this projected to cost? And where is the money coming from?
The North-South By-pass tunnel is going to be a little over $1billion.
The Airport link is going to be a little under $1 billion(there'll be some cut and cover)
The rest haven't been costed and the money will come from private investors at minimal cost to the public.

Yes, they will be tolled.
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Old December 19th, 2005, 11:06 AM   #67
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Oh, they'll be tolled lol. Well that helps explain it...

But that's still alot of money. I wonder how much will be charged. And I'm surprised that Brisbane actually has so much traffic that all this would be necessary. Generally the thought of that much highway capacty being added to a city would seem negative to me, but I'm not really against expressway construction as long as it's tolled. It can actually strike a good balance.
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Old December 19th, 2005, 02:17 PM   #68
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The tolls won't excede AU$3 per tunnel.

Brisbane does have very serious traffic issues in the inner city. The Pacific Motorway is the only one that goes into the CBD. The others all end approximately 5-10Km outside the CBD. This project is simply to link those motorways and the CBD and take through traffic off the narrow, clogged surface roads.

And also, keep in mind, it's not all happening overnight. This is part of a 10-15 year plan.
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Old December 19th, 2005, 03:02 PM   #69
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Urban tunnels are definitely the ultimate solution for moving massive amounts of cars throughout a city while saving/conserving/protecting/connecting premium city spaces. In Washington, DC there is a preliminary to create a tunnel from the I-395 interstate, whereby they would tunnel the interstate and create a "boulevard" with city activity above it.

Last edited by urbanaturalist; December 19th, 2005 at 08:42 PM.
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Old December 20th, 2005, 03:31 PM   #70
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Currently under construction in Tokyo is the Central Circular Loop 中央環状, a ring highway linking the main routes into the city. This is the first of three ring roads planned, the others being the Gaikan 外環 and the Kenno 圏央. Because of all of the urban development, most of the central loop is being built underneath one of the major ring roads. Stage one is currently nearing completion, linking Ikebukuro, Shinjuku and Shibuya, about 11 kilometers in length. Plans are underway to continue the loop to Haneda Airport.

An English site written by a visitor of the project
http://www.bigempire.com/sake/circular_route.html

And the Japanese website (no English)
http://www.tokyo-tunnelix.jp/
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Old December 20th, 2005, 06:46 PM   #71
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Vienna:

The A23 motorway, one of the roads with heaviest traffic in Europe. It can really be a big pain in the ass. (211.000 cars per day.)

Laaerbergtunnel:




Absbergtunnel: (artificially created)


[IMG]http://www.wabweb.net/verkehr/bilder/a23/images/a23absbergtunnel5.jpg
[/IMG]









Stadlauer Tunnel:






The motorway A22 from the north:

The Kaisermühlen-Tunnel:





Salzburg:
The A1 motorway crossing the city:

Tunnel Liefering:







Linz:

The motorway A7:

Tunnel Bindermichl:

construction work:









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Old May 21st, 2006, 06:55 PM   #72
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Genoa - Italy







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Old May 21st, 2006, 07:13 PM   #73
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Quote:
Originally Posted by sbarn
Not true... it has been replaced by an elevated but not double-decked highway as was the original cypress. Here are some photos from the new structure which has only been open about 5 to 7 years.



Where it meets I-80:




Good riddance... it has been replaced by this beautiful promenade.



Incredible
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Old May 21st, 2006, 08:21 PM   #74
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Quote:
Originally Posted by Accura
Manchesters A57M
Does every "Lord Mayor" automatically become "Right Worshipful", our does he (or she) need to order a couple of concrete-mixers to the party to do the job?
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Old May 21st, 2006, 08:35 PM   #75
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Quote:
Originally Posted by greg_christine
THAT IS GRAET
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Old May 21st, 2006, 08:44 PM   #76
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Gdynia - Poland











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Old May 21st, 2006, 10:00 PM   #77
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Here are some more photos of Genoa, Italy:

1.


2.


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5.


6.


7.


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10.


11.


12.


13.
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Old May 22nd, 2006, 03:45 PM   #78
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I don't hate the principal of elevated highways. They are kind of futuristic - urban planes separating the cars from the pedestrian zones. The biggest problem is that they seem to be so poorly designed that they look awful instead of functioning with the city fabric.
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Old May 22nd, 2006, 05:57 PM   #79
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http://skyscrapercity.com/showthread.php?t=266586

hurriedly built for the Olympics, notorious for covering the historic bridge.
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Old May 23rd, 2006, 03:26 PM   #80
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from MELBOURNE, AUSTRALIA

'Citylink' Tollway (M79)










Viaduct on the M80 Ring Road






there are a couple more viaducts that I don't have pics of.
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