I drove some of that route last year - on a less windy day thank goodness - but it was still spectacular.
It is a spectacular recent addition to the countries road network, but not the most amazing road in Norway.
They have a road tunnel which is 15+ miles long, another which you enter at sea/fjord level and it spirals up and around for ever before discharging into the snow capped mountain several 100metres above. They are now planning a cruise ship size tunnel to join two fjords and stop a perilous journey around some rocky headland
But this was the most amazing road I found there. It was much quieter when I drove it, but I did have to negotiate a significant mudslide half way up which was challenging in a 2 wheel drive automatic car!
https://www.youtube.com/watch?v=RHJBJVWCvBoIts an absolute pleasure to drive in Norway, despite the weather and hideous prices!!