@bobal:
The Roki tunnel is on the watershed divide between the North Caucasus and South Causcasus. It leads directly into South “Ossettia”.

The one to watch is the much lower elevation, ancient route south from “North” (“Authentic”) Ossettia through the Darial Pass. It is well North of the watershed divide

It is very interesting that Georgian territory runs North of the watershed line from there, along the border with Ingushetia and along the border with Chechenya, far North the infamous Pankisi Gorge which is well inside Georgia.

Georgia’s border jumps back to the watershed at Dagestan border until it runs into friendly old Azerbaijan. There it jumps downhill again to the famous Alazani River, drainage to some of the world’s oldest and greatest wine-grape growing lands.

Seems to me that Georgia has a lot of border troubles ahead. This region is not going to quiet down anytime soon.

Time for a shotgun marriage: Turkey, Georgia, Azerbaijan. Armenia can catch up later.