Highway Thru Hell - Season 1 Episode 6
The Avalanche Zone

Heavy snowfall has created avalanche conditions on the Coq. Plow crews are barely able to keep up. When traffic starts backing up in high-risk avalanche zones, highway authorities decide to close the road in both directions. A team of avalanche techs flies up the mountain in helicopters to drop concussion bombs and release the build-up, but bad weather hampers their first attempt. With the Coq closed overnight, trucks are using the back roads to get through.