Black ice is commonly a thin, unexpected and invisible coating of ice on a roadway or walkway surface. The thin ice appears as the color of the material beneath it. Minute precipation amounts are adequate to create slippery, unnoticed and dangerous situations, where travelers have minimal indication of weather changes. Fog, alone, in the absence of any falling precipation can create a slippery coating to smooth, horizontal surfaces. Because it is always so difficult to see, it represents a universal hazard to automotive traffic, cyclists, motorcyclists, pedestrians, mountaineers and sailors.
http://en.wikipedia.org/wiki/Black_ice
No comments:
Post a Comment