Due to high winds we were stranded in 'avalanche alley' as no trains were allowed to cross a bridge over the river.
These wires detect any avalanche and trigger an alarm in the control centre if two or more wires are broken at the same time.
We couldn't move forward because of this freight train in front of us.
After we were hit by falling rocks, the freight train was persuaded to move up a bit so we could get to safety.
Three or four of these curved glass panels were cracked at a cost of around £6000 each.