This article covers them all:
20 Greatest Driving Roads in the World
From Highway 1, Stelvio Pass, Amalfi Coast, Deals Gap, Ruta 40, Touge Fuji, Transfagarasan Highway to the Trollstigen.
However, there are 2 roads missing on the above list.
First is almost unbelievable The Jebel Hafeet Mountain Road in Saudi Arabia, brand new built highway on the top of the mountain, stretching over 11 kilometres and reaching altitudes of 1.2 kilometres of height.
Amazing at night, absolutely out of this world:
Take a look at this wonderful video:
Second one lies on the Croatian island of Hvar (Pharos), it is over 80km long and it is the main island road that connects two sides of the island.
Road travels inside the very island, it has few mountain climbs and downs, it has both coastal and inside sections and starts as a 60-years old asphalt road with old tarmac and almost no modern properties. Once you do first mountain climb and come down it becomes a provincial road through inside of the island and then it transforms into modern road once you reach the middle of the island. Passing by the small towns and seaside you reach the main tunnel going to the city of Hvar and from then it becomes a windy fast modern speedway heading up and down the mountain slopes with stunning view on the sea on your left side.
Hvar road is truly an amazing one - I drive there for last 10 summers on my vacation - and I hope it will be recognised one day by the more worldwide audience.
Here is the map showcase, starting point is on the right (Sucuraj, where the heart is), while ending point is on the left side, at city of Hvar. You can get the idea.
And here is the
link to Google Maps to check it out.
I do not have Google World installed, but I presume it offers even better idea about the Pharos Road (as I call it).
This video shows the point of ferry disembark at Sucuraj and fast-forwarded (and heavily cut-off, you can see the time-stamps) sections until they've reached the city of Vrboska. It covers the "old" mountain-climb section and middle "more modern" section where you drive inside the Hvar island. After you reach the town of Vrboska (where he turns right from the main road in order to reach the Vrboska) the Pharos Road continues to the final 2 more modern and amazing sections.