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 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. There is thus a risk of skidding and subsequent accident due to the loss of traction.