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One shudders to imagine the air quality in that tunnel... The ventilation system will likely be the most notable engineering feat of the project.

vidarh 6y ago
Norway has a lot of long car tunnels with extensive ventilation requirements, so I'm sure it's in hand.
- fifilura 6y ago
  The Norwegians are like the Doozers in Fraggle Rock - they will not be satisfied until the whole country is like a swiss cheese. We once took a road trip to Bergen - after 10km in a tunnel, you turn left in an underground roundabout and suddenly see light. At the end of a tunnel is a steep cliff and you just drive directly onto a km long suspension bridge crossing the fjord.
  - vidarh 6y ago
    Having driven the old road, and not even the oldest one (which was extremely winding through the mountain-side), I get why. First time I did as a child, we had to stay overnight and then drive in a column to get to the main tunnel at the time because of snow storms. In April. The route from Oslo to Bergen has been an issue for centuries.
  - hanche 6y ago
    The country is already like a Swiss cheese! But the majority of the tunnels carry water, connecting various water reservoirs and hydroelectric power generators,, not traffic.
szszrk 6y ago
It looks quite high on visualizations, possibly standard ventilators like those in road tunnels, that just provoke airflow through tunnel will be sufficient. It's "just" 1,7km long. Of course pollution will be high, but traffic low, compared to cars. It seems like something that may not require any new revolutionary systems, just old school solid engineering.
silvestrov 6y ago
Norway has a lot of electric ferries, so it will not be as bad as you'd think. https://plugboats.com/norway-leads-an-electric-ferry-revolution/ https://plugboats.com/norway-leads-an-electric-ferry-revolut...
throwaway0a5e 6y ago
The wind difference between the ends of the tunnel likely provides pretty substantial ventilation. It also wouldn't be hard to just have a X-minute pause between ships to let the air clear out. Or they could just install ventilation. This is a non-issue.

vidarh 6y ago

Norway has a lot of long car tunnels with extensive ventilation requirements, so I'm sure it's in hand.

fifilura 6y ago
The Norwegians are like the Doozers in Fraggle Rock - they will not be satisfied until the whole country is like a swiss cheese. We once took a road trip to Bergen - after 10km in a tunnel, you turn left in an underground roundabout and suddenly see light. At the end of a tunnel is a steep cliff and you just drive directly onto a km long suspension bridge crossing the fjord.
- vidarh 6y ago
  Having driven the old road, and not even the oldest one (which was extremely winding through the mountain-side), I get why. First time I did as a child, we had to stay overnight and then drive in a column to get to the main tunnel at the time because of snow storms. In April. The route from Oslo to Bergen has been an issue for centuries.
- hanche 6y ago
  The country is already like a Swiss cheese! But the majority of the tunnels carry water, connecting various water reservoirs and hydroelectric power generators,, not traffic.

szszrk 6y ago

It looks quite high on visualizations, possibly standard ventilators like those in road tunnels, that just provoke airflow through tunnel will be sufficient. It's "just" 1,7km long. Of course pollution will be high, but traffic low, compared to cars. It seems like something that may not require any new revolutionary systems, just old school solid engineering.

silvestrov 6y ago

Norway has a lot of electric ferries, so it will not be as bad as you'd think. https://plugboats.com/norway-leads-an-electric-ferry-revolution/ https://plugboats.com/norway-leads-an-electric-ferry-revolut...

throwaway0a5e 6y ago

The wind difference between the ends of the tunnel likely provides pretty substantial ventilation. It also wouldn't be hard to just have a X-minute pause between ships to let the air clear out. Or they could just install ventilation. This is a non-issue.