Originally Posted by
FBinNY
Black ice forms only within a narrow temperature band near 32F. (lower on salted roads). There are many techniques for riding safely on icy roads, but black ice hazards relate to riding on roads that are generally clear or unfrozen. So it's the element of surprise that creates the greatest danger.
Terminology overload.
What I grew up thinking of as black ice is formed under different conditions. Black ice to me is when it's so cold that the water vapor from car exhaust freezes on the pavement while the cars are stopped at lights. It's especially treacherous because it's at intersections where people are trying to stop. It's also too cold for salt to have any effect.