Most the roads I have seen would be too modern for your purpose I think.  I remember one from some time ago but I am fairly sure that was for Carrara, so not a lot of help I am afraid.

The new Terradome at RDNA looks interesting but I managed to get Vue during a sale last year so it is not for me but without Vue I think I would give it a go.

Yeah, it needs to be a dirt road. If I was trying to do post apocalyptic or old west, the Terradome would be perfect. Unfortunately, from what I can tell, it doesn't have a forest landscape or an add-on pack for one.