Roki tunnel pass
The Roki Tunnel is a mountain tunnel of the Transkam road through the Greater Caucasus Mountains, north of the village Upper Roka. It is the only road joining North Ossetia–Alania in the Russian Federation into South Ossetia, a breakaway republic of Georgia. The tunnel, completed by the Soviet government in 1984, is one of only a handful of routes that cross the North Caucasus Range. It is at about 2,000 meters (6,600 ft) altitude and its length is 3,730 meters (12,240 ft), and near the Roki Pass at about 3,000 meters (9,800 ft) altitude, which can only be used in summer. The other routes between Georgia and Russia include the Kazbegi–Verkhni Lars customs checkpoint on the Georgian Military Road, closed June 2006 and reopened 2010, and the Gantiadi–Adler crossing in Abkhazia which Georgia asserts functions illegally.