One of my most favorite parts of the world...South Island, NZ and all of that great isolation as you depicted.   Peaceful.   I would like to comment that I would suggest maybe trying to bring out the highway more or give some more defintion to the hills from a saturation/tonal contrast sort of a way.   I "think" there are yellows and greens that can be brought out a little more.   But...a good picture is what it does to the beholder..this makes me want to get out on the highway and drive.....thanks!