What is "black ice" more commonly known as?

Black ice is more commonly known as frozen dew. This term refers to a thin layer of ice that forms on the road surface when dew freezes, often after calm and clear nights when temperatures drop. The presence of black ice can be particularly dangerous because it is usually transparent and blends in with the color of the pavement, making it difficult to see.

The other terms provided in the choices relate to different atmospheric phenomena. Haze refers to atmospheric moisture or pollution that affects visibility but does not involve ice. Frost is the formation of ice crystals on surfaces when temperatures drop below freezing, but it typically occurs in a thicker layer than black ice. Fog is made up of tiny water droplets suspended in the air, significantly reducing visibility without the formation of ice on surfaces. Hence, frozen dew appropriately describes the conditions associated with black ice.