Roki Tunnel is an international high mountain tunnel at an elevation of 2.130m (6,988ft) above the sea level, located in the Caucasus Mountains, a mountain system in Eurasia between the Black Sea and the Caspian Sea in the Caucasus region. The tunnel is traversed by the Transcaucasian Highway.
Avalanches and heavy snowfalls can sometimes block some sections of the road and can be extremely dangerous due to frequent patches of ice. In the winter months the road is often closed due to the danger of avalanches. The tunnel, completed by the Soviet authorities in 1984, has a length of 3,730 meters, and is located near the Roki Pass at about 3,000 meters altitude, which can only be used in summer.
The surface of the road is a bad asphalt. The weather on this zone is harsh and highly unpredictable and it does not take much time for the bright sun shine to change over to moderate to heavy snow fall. The tunnel (also called Roksky Tunnel) is the only road joining North Ossetia–Alania in the Russian Federation into South Ossetia, a breakaway republic of Georgia.