Most of this road is new asphalt on a great twisty route. You ride most of the way through the forest and don't have the greatest view until before you head down to Serino. At that point the view is absolutely unbelievable. The is a view point to stop and admire the view from the top. This would not be a good point to go off the road since it drops off hundreds of meters below. Some of the big turns are long, sweeping, and banked. I about ripped my floorboards off and scratched the heck out of my pipes I was having so much fun.
The route from Battipaglia starts out great almost immediately. You climb right up into the mountains and have a spectacular view of the coast to the right and rock faces to the left. The road is in great shape with no potholes or deterioration until two thirds of the way when you enter the Avelino region, where the roads can get pretty rough here and there.
All of this road has been repaved in the last two years. From a distance on the map a good portion looks straight. It is far from it. there are countless curves as you traverse the pass through the mountains. It is like doing a downhill slalom on skis.
From Bormio take the S42 and then S300 south towards Ponte di Legno. You can go a little further and end at the Passo di Tonale at a mere 1883 metres. On the way you'll pass over oen of the highest passes in Europs and in this area only the Stelvio out does it - The Gavia Pass, a mere baby at 2618m or 8617 feet - N46.3437 E10.4875!
Not the best biking road in Europe, but certainly some spectacular hairpins and dramatic views to rival the Stelvio. Usual blind hairpins and tourist traffic problems apply. Spectacular nonetheless