John, that's a great find there. I think I did see some houses in that area on Google maps, yet it is really good to know about old roads. I live near one and remnants of it are still there... (to make it clear... NOT in VA, I live in PA) Another road that I know got changed but you would never know by looking now. So I guess it depends on if the department wanted to spend money in making sure it was gone or not.
Frankly, I"m still more concerned about the old road that is at the upper portion and to the left of your map. If I am understanding correctly, that is some really hidden areas back there. I still can't shake the feeling that there is something about that area down there that needs to be investigated.