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> My ice is just as slippery at -15 F and 30F. The light is to warn you
> of the potental of running into slippery conditions and they do ...
You are mistaken. Your ice, although much more slippery than asphalt, is *not* as slippery at 15F as it is at 32F. At near-freezing (or near-melting) temperatures the friction coefficient is much less because there is a layer of lubrication (water) between two surfaces. At lower temperatures there's no lubrication. That's why 'cold' ice is less slippery than 'warm' ice.
If you ever lived in a cold area where temeratures drop well below 32F, you would know that.
Cheers,
Vadim.
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