Oh man, I ve been on those roads in the Andes (second pics with trucks passing each other).
I'm half Bolivian and I have family down there. To get from La Paz the capital located high up in the mountains, to Cochabamba you have to use thes roads. Scarry as hell is an understatement.
We were in a old school Toyota Landcruiser, and man you can feel the ground giving way when you pass by trucks on the outside.
There are also sections that bodies of the poor indigeonous people are burried on the side of the mountain, and the errosion causes the bones to be clearly visible while you drive by. Crazy stuff.
