What’s black ice?  When ice forms unexpectedly on roadways it
often is called black ice because it is so difficult to detect
and it is often unexpected.  Black ice frequently is obscured
because it typically is a thin layer of ice. Black asphalt or
concrete frequently is still visible through the thin layer of
clear ice, making it even more difficult to detect.  The thin
ice forms on bridges and overpasses before the rest of the
roadway. Cold air can circulate both above and below the
surfaces of elevated roadways, causing bridge and overpass
temperatures to drop more rapidly and freeze quicker than the
rest of the roadway.     Please review our Policies and
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