Norwegians build a roundabout in a tunnel
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- roadtester
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Norwegians build a roundabout in a tunnel
Electrophorus Electricus
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Re: Norwegians build a roundabout in a tunnel
I've driven this roundabout. There's one on the other side of the fjord as well. I've driven the Hardanger Bridge a few times and it has to be one of the finest bits of engineering I've seen. Here's my video of the crossing.
As for junctions in tunnels, I've driven a Norwegian tunnel with a regular t-junction in it and I've driven two tunnels with grade separated junctions in them. I wouldn't go as far to say that underground junctions of all types are common in Norway but there are quite a few of them if you know where to look.
As for junctions in tunnels, I've driven a Norwegian tunnel with a regular t-junction in it and I've driven two tunnels with grade separated junctions in them. I wouldn't go as far to say that underground junctions of all types are common in Norway but there are quite a few of them if you know where to look.
Re: Norwegians build a roundabout in a tunnel
West Ferry Circus at Canary Wharf, London, is a roundabout in a tunnel (unfortunately no Streetview of the inside).
Re: Norwegians build a roundabout in a tunnel
Not only a fork GSJ but also S2+1 crawler lanes!Burns wrote: ↑Thu Sep 20, 2018 17:30As for junctions in tunnels, I've driven a Norwegian tunnel with a regular t-junction in it and I've driven two tunnels with grade separated junctions in them. I wouldn't go as far to say that underground junctions of all types are common in Norway but there are quite a few of them if you know where to look.
Re: Norwegians build a roundabout in a tunnel
S2+1 crawler lanes are common in sub-sea tunnels due to them usually having 8% to 10% gradients. Running along the sea floor, they'll often drop back to S2 for a bit, meaning the tunnels have interesting profile changes as you pass through them.
Re: Norwegians build a roundabout in a tunnel
I'd have expected the tunnels to remain a constant width but with the centre area protected by bollards in that scenario, but the cost of wider tunnel bores would not provide any benefit.
Bryn
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She said life was like a motorway; dull, grey, and long.
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Terminally cynical, unimpressed, and nearly Middle Age already.
She said life was like a motorway; dull, grey, and long.
Blog - https://showmeasign.online/
X - https://twitter.com/ShowMeASignBryn
YouTube - https://www.youtube.com/@BrynBuck
Re: Norwegians build a roundabout in a tunnel
Why blast more than you need to? Here's a good example of a profile changing tunnel.
Re: Norwegians build a roundabout in a tunnel
i guess when you're tunneling through solid rock by blasting, rather than boring through softer ground, it's rather simpler to have a changing profile
- FosseWay
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Re: Norwegians build a roundabout in a tunnel
Never underestimate the Scandinavians' desire to deploy dynamite.
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