A thin sheet of ice, relatively dark in appearance, may form when light rain or drizzle falls on a road surface that is at a temperature below 0 ☌ or, alternatively, when water already on the road surface subsequently freezes when its temperature falls below freezing point. A popular alternative for the term "glaze".
The World Meteorological Organization definitions of black ice are: Black ice can also form when roadways are slick from rain and temperatures drop below freezing overnight." It is most prevalent during the early morning hours, especially after snowmelt on the roadways has a chance to refreeze overnight when the temperature drops below freezing. It is often clear (not white) with the black road surface visible underneath. The term "black ice" in the United States is defined by the National Weather Service as "patchy ice on roadways or other transportation surfaces that cannot easily be seen. There is, thus, a risk of slippage and subsequent accident due to the unexpected loss of traction.
#Black ice driver printer drivers
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 people stepping on it. The ice itself is not black, but visually transparent, allowing the often black road below to be seen through it. Warning sign for icy pavement in Quebec, Canadaīlack ice, sometimes called clear ice, is a thin coating of glaze ice on a surface, especially on streets.
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