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  • Black ice, sometimes called clear ice, refers to a thin coating of glazed ice on a surface. While not truly black, it is virtually transparent, allowing black asphalt/macadam roadways or the surface below to be seen through it—hence the term "black ice". The typically low levels of noticeable ice pellets, snow, or sleet surrounding black ice means that areas of the ice are often practically invisible to drivers or persons stepping on it. There is, thus, a risk of skidding and subsequent accident due to the loss of traction. A similar problem is encountered with diesel fuel spills on roads.

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