Rogfast
Undersea road tunnel under the Boknafjord in Rogaland, Norway, with an underground interchange beneath the island of Kvitsøy. See Norway (Literary).
At a glance
| Source | Author | Role | In one line |
|---|---|---|---|
| The MASSIVE Ventilation Shafts Under Norway | The B1M | subject | Two roundabouts 250 metres under a small island. |
| Inside the World’s Deepest Road Tunnel | The B1M | subject | A walk 6.5 km into the tunnel face, 390 m below sea level at its deepest. |
The MASSIVE Ventilation Shafts Under Norway — The B1M (2026)
Source: Original · Readwise highlight
There’s a freaking underground roundabout here.
- Role: subject
- In the video: The presenter stands at the bottom of a finished ventilation shaft under the island (spelled “Kavitzoy” in the auto-transcript, population 500). Some 250 m below, the interchange has two roundabouts, a link tunnel and a 4.1 km slip road climbing to the island, with access tunnels and shafts threaded between them, which the video calls a world first.
- Why it matters: The interchange is the video’s subject. The text’s spellings (“Rockfast”, “Kavitzoy”) are transcription errors for Rogfast and Kvitsøy.
Inside the World’s Deepest Road Tunnel — The B1M (2026)
Source: Original · Readwise highlight
a twin bore tunnel running 27-kilometres across the mighty Boknafjord.
- Role: subject
- In the video: Starting from Stavanger, the presenter walks about 6.5 km into the tunnel to the drill-and-blast face: jumbo drills, grouting, and wet fault zones in the gneiss. The twin bores reach about 390 m below sea level, and the video points to the Kvitsøy interchange and to Norway’s wider plan of fjord crossings such as Sulafjorden.
- Why it matters: The tunnel is the subject; this earlier video shows construction from the inside, where the later one shows the finished interchange shafts.