Criticize My Route! What should I Change?

I'll be cruising the southern border this summer. Where am I unknowingly skipping a road I should be using instead of the one currently in the rough draft? Is there a road in my rough draft that just sucks, and should be avoided? Natural beauty and as close to 0 other cars on the road is ideal. I'm a hardcore introvert, so my vacations are designed to get away from people, as opposed to meeting them.