The road is a very narrow path through the valley and oncoming trucks and trailers need to be given room. It takes a lot of control to dodge all types of imperfections in the road surface. Sometimes the road will drop out from under you in a rolling bump that you might not notice or there will be a chunk missing out of one side. This road needs to be respected at all times. Plus I have seen a lot of sand and asphalt patches that have a lot of material left on the road around them. It's a workout.
