Yes they do!
In reality this road is in a National Park, and they do mow to keep it neat and clean, and for better visability. And not just in parks.
The later due to the fact that there are generally very tiny or NO shoulders on their roads. Which seems to be true for much of the SE USA. As I drive my GT on this Rally V road trip, I am continually looking for that "escape route" for that just-in-case situation. Disconcerting for those of us from the West. However the roads are generally very smooth and well maintained.
We've done about 1,500 miles on two lane roads, so far, and as compared to "our" two lane roads they have 10-15 mph higher speed limits. And a few times we're driving the GT's well below the posted limit, more than likey due to our conditioned habits from back home.
Jeff