It's not just 2 of 3 homes. These are two lane state highways. Due to the topography they have to follow the rivers. You have a rock face on one side that goes straight up and just off the shoulder on the other side it drops off into the river. Even the railroads follow the rivers through the valleys. The little bridges going to homes are privately owned. The roadbed for these highways has been completely destroyed. The rivers have carved out new channels and are now much wider. Entire small towns have been cut off with no access to the outside world. All supplies have to be flown in by helicopter or pack mules. It's one big mess. In many cases tourism was the only source of income for these small communities. Now that's gone with the highway.