I have seen most of those pictures on various websites, I can hardley look at them without getting that "feeling" in my gut that I am going to slip or fall of those roads.... Those truckers are freakin NUTZ!!!! Can you imagine if it is foggy ot rainy?? WOW what a great set of pictures but this is as close as I will EVER get to them!!
I went up one in Venezuela on Mount Bolivar that is probably worse than that. It was all dirt and gravel with several sections missing. Didn't ride a bike though...started in a jeep then onto mules then hiked. Sure had sore muscles at the end of that trip...took 3 days.