With Extreme Cold, MnDot Warns of “Black Ice”

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MANKATO, Minn. – The Minnesota Department of Transportation reports that the extreme low air temperatures and windy conditions we are experiencing is causing black ice on area highways and on the interstate.

Black ice is an invisible hazard that catches drivers’ off-guard and frequently causes crashes.

Several spinouts or crashes have been reported already.

Black ice creates the appearance of a wet surface, but it is actually a thin, clear layer of ice on roads and bridges. Black ice forms when melting snow refreezes.

The hazard can also form when snow temporarily melts from auto exhaust emissions or tire heat and from moisture vapors given off by industries located close to the highway.

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