Travel safely on rails and roads. To make mountain travel safe, extensive safety measures must be taken. In summer, buildings are erected to protect against rushing waters; in winter, they are built to protect against avalanches and landslides.
Every 20 to 30 years, an avalanche falls into the valley. The alarm calls the rescuers to work. Men and machines do everything they can to clear the snow as quickly as possible.
At the green light, the anonymous and unknown rescuers return to their daily routine.