I wanted to do a lot more with this, but when I realized that I had spent two hours just on what's there and that most of that time was copy-pasting concrete barriers, I realized that my ambition had outreached my patience and decided it's Good Enough™. So there's nothing really stopping you from powerbombing down the mountain in a straight line after the first switchback, but I will say it's more entertaining to take the whole route. If only because physics tends to get really, really unhappy with my over-tuned Unimog when it starts to fall over.
It was pretty fun making all the little details around the rockslides though.