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Old September 29th, 2014, 12:52 PM   #2821
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That would mean boring new tunnels right? The existing ones are 2+2.
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Old September 29th, 2014, 04:36 PM   #2822
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How deep is Lac Léman there? Is it comparable to a fjord? The Norwegians have been building such tunnels on an increasingly larger scale - the largest currently in advanced stage of design is 26 kilometers long (double-tube).
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Old September 29th, 2014, 05:35 PM   #2823
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Quote:
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The Norwegians have been building such tunnels on an increasingly larger scale - the largest currently in advanced stage of design is 26 kilometers long (double-tube).
What is the name of that tunnel ?
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Old September 29th, 2014, 05:38 PM   #2824
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It is the Boknafjord Tunnel.
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Old September 29th, 2014, 08:09 PM   #2825
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Quote:
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How deep is Lac Léman there? Is it comparable to a fjord? The Norwegians have been building such tunnels on an increasingly larger scale - the largest currently in advanced stage of design is 26 kilometers long (double-tube).
Wow, that's impressive. It will be the longest road tunnel in the world (1,5km longer than the Laerdal tunnel), and, by far, the longest double-tube road tunnel in the world.
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In real life, electronic toll collection was first introduced in Bergen, Norway in 1986, and well into the 21th century many countries still struggle to implement it.
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Old September 29th, 2014, 10:37 PM   #2826
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Quote:
Originally Posted by ChrisZwolle View Post
How deep is Lac Léman there? Is it comparable to a fjord? The Norwegians have been building such tunnels on an increasingly larger scale - the largest currently in advanced stage of design is 26 kilometers long (double-tube).
Not much,

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Old September 29th, 2014, 10:39 PM   #2827
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I see, that makes a tunnel much cheaper than in Norway (you don't need long ramps). Some Norwegian tunnels even have spirals to gain or lose altitude (similar to several tunnels in Switzerland I know of, for example the A8 tunnel near Brienz, or a local tunnel up to Isenfluh)
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Old September 29th, 2014, 10:45 PM   #2828
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Quote:
Originally Posted by ChrisZwolle View Post
I see, that makes a tunnel much cheaper than in Norway (you don't need long ramps). Some Norwegian tunnels even have spirals to gain or lose altitude (similar to several tunnels in Switzerland I know of, for example the A8 tunnel near Brienz, or a local tunnel up to Isenfluh)
SS659 in Piedmont, Italy, has an helix-shaped tunnel to climb a steep slope.
https://www.google.it/maps/place/Dom...a82f52298219d1
It's the only one in Italy.
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In real life, electronic toll collection was first introduced in Bergen, Norway in 1986, and well into the 21th century many countries still struggle to implement it.
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Old September 29th, 2014, 11:06 PM   #2829
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There is another spiral on a road in Italy, near Rome, but it is not entirely underground and I cannot remember where it is exactly. Then there are the San Boldo pass horseshoe tunnels.

Chris, the A8 Soliwald and the Isenfluh tunnels are the only spiral road tunnels in Switzerland I can remember right now. Are there others? In Norway, I know the spiral tunnel in Drammen, are there others?
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Old October 7th, 2014, 08:12 AM   #2830
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The National Council (Nationalrat) has approved the construction of a second Gotthard Tunnel tube with a comfortable majority; 109 votes for and 74 against.
The quest for signatures started this morning: http://www.noalraddoppio.ch/nein-2te...ews_aktiv.html
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Old October 7th, 2014, 08:58 AM   #2831
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Quote:
Originally Posted by Coccodrillo View Post
There is another spiral on a road in Italy, near Rome, but it is not entirely underground and I cannot remember where it is exactly. Then there are the San Boldo pass horseshoe tunnels.
There is also the southbound carriageway of A6 near Savona:
http://www.openstreetmap.org/#map=16/44.3169/8.3786

not entirely in tunnel, but this is the only spiral curve on motorway in Italy, possibly in Europe.
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Old October 8th, 2014, 08:42 PM   #2832
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A9 Sierre - Susten

The construction of A9 through the Pfynwald has been approved by the Bundesrat. It is 8.5 km of motorway from Sierre to Susten. Nearly the entire project is underground, in two tunnels of 2080 m and 4200 m.

http://www.srf.ch/news/schweiz/900-m...meter-autobahn
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Old October 9th, 2014, 06:51 PM   #2833
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900 CHF? 743 million € for 8.5km? When will the works begin?
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Old October 9th, 2014, 07:06 PM   #2834
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Hard to tell. The whole A9 project has been delayed by years. The tunnel at Gampel has been 'under construction' since 2005 or so, and from the looks of it, won't be completed before 2020. Considering the geological difficulties along other parts of A9, it could be delayed even more.
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Old October 9th, 2014, 08:57 PM   #2835
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Source: https://www.news.admin.ch/message/in...e&msg-id=54750
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Old October 9th, 2014, 10:21 PM   #2836
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Photos of the construction of the San Bernardino tunnel: http://mediathek-graubuenden.mtgr.ch/pool/25
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Old October 10th, 2014, 11:29 PM   #2837
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The Poya bridge in Fribourg will finally be opened next sunday

News report in french: RTS







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Old October 11th, 2014, 12:23 AM   #2838
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News report in German for those of us preferring that language: http://www.nzz.ch/schweiz/eine-bruec...aus-1.18401629
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Old October 11th, 2014, 12:33 AM   #2839
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IS that a 3+1 bridge ?
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Old October 11th, 2014, 01:12 AM   #2840
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it's 3 lanes for cars, 1 towards route de Morat (to the west, i.e. the side of the old city) and 2 towards the other direction. The other lane is reserved for pedestrians and bicycles; it might seem like a waste of space but the authorities were probably afraid of a disproportionate increase in traffic had they arranged it as 2x2, which would have clogged the roads leading to the bridge; route the Morat is 2x2 and so the expected increase of traffic there is calculated at 7% only, but on the other side there are only 1x1 roads and traffic increases are estimated at 14% for route de Berne and 19% for route de Tavel.

Some very nice pics in here: http://www.pontpoyaphotos.ch

by the way, it's the longest cable bridge in Switzerland.
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