After leaving Windsor on the Sydney outskirts, the road winds through a twisty section as it climbs and descends into the countryside. Whilst the corners are good, the surface is not, so bide your time, till you reach the Colo Heights area (Petrol available), whereupon the road begins to open up.
The next section is fairly fast with very few hazards except for random wildlife from the National Parkland. There are no real side junctions. It carries on for a fair while and may be considered a little dull by some, but again, there is a reason why this is such a great road...
In the northern section, the Putty road approaches a line of hills which stand between the National Parkland and the famous vineyards of the Hunter valley. As these hills get closer, the surface changes from average to very good and the road starts to twist and turn in all directions as it navigates a pass through the hills. This is the known as the 15k bends. They start to come thick and fast, almost all are well signposted and the surface remains consistently good. Whilst, this is an extremely twisty and challenging section, there are a couple of points where a decent road bike will be able to overtake, so dont despair if you find yourself stuck behind a slow moving car.
The 15k bends make the entire journey worthwhile, and will be enjoyable on any size of bike. While they are certainly twisty, there are no real frighteners that come from nowhere, so with a little caution mixed with a little confidence, you can have use your tyres as God intended.
A high speed section with quite a few straights and some nice high speed corners. As this is main road, there's not much room for error (run off) available on the corners, so be careful