Forum Discussion
richfaa
Feb 05, 2016Explorer
The term black ice in the United States is often incorrectly used to describe any type of ice that forms on roadways, even when standing water on roads turns to ice as the temperature falls below freezing. Correctly defined, black ice is formed on relatively dry roads, rendering it invisible to drivers. It occurs when in the textures present in all pavements very slightly below the top of the road surface contain water or moisture, thereby presenting a dry surface to tires until that water or moisture freezes and expands; drivers then find they are riding above the road surface on a honeycombed invisible sheet of ice.
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