Roads in the sky
What do you do if you want a new road but you don't want to knock down any buildings and killing grass or trees? Build it in the sky!
I do not know for sure whether that is the thinking behind Austin road-building, as there are also quite a few flyover roads on the edge of town, even where the only thing to fly over seems to be empty fields. America is a car culture, so of course there are a lot of big roads, and surely this helps with congestion problems (although you definitely don't want to get stuck in a slow lane during rush-hour in the summer when your air-conditioning is broken).
But they don't dominate the view. You only really notice them while on one. Real life is lived at ground level.