Big trucks braking system on a snowy highway doesn’t work so good

It happened the other day on a highway in the Czech Republic. Several cars managed to stop the car on the snowy road but due to the fog and high speed the trucks coming from behind could not stop. This created a real carom.

We do not know exactly how many cars were in front in this situation but the fact that no one thought to go back 100-200m and signal the area, led to this situation.