In which specific situation is it mandatory to use snow chains or approved anti-slip devices?

Question

DentroTest · Accepted Answer

The use of chains (or winter tires/similar devices) is mandatory when indicated by road signs (Sign R-412) or when road conditions, such as the presence of snow or ice, prevent proper adhesion of standard tires. It is not sufficient for the temperature to be low (the ground could be dry) or for it to be snowing lightly (if the snow does not settle, chains would damage the asphalt and tires). The determining factor is the loss of traction and grip on the road surface.

In which specific situation is it mandatory to use snow chains or approved anti-slip devices?

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