Canada is a federal state like the US, and it similarly delegates much of the power to regulate driving to the provinces.

British Columbia mandates winter tires on highways going through the mountains, and chains for trucks. I wish other provinces would put in similar mandates, because it's a bit of a clown show on the roads right now in Saskatchewan.

The main highway going East-West (Trans-Canada 1) requires you to put on snow tires during the winter.

I think it might only be an Alberta, BC provincial thing though.