From: Jim Rader
>A common name for this phenomenon in the northeast U.S. is "black
> My dictionary gave "glazed frost", which somehow sounded too weird to
> trust. By the way, it can happen more or less anywhere if a period of
> freezing wheather is followed by thaw. But I suppose it needs paved
> streets for its effects to become spectacular. You can't keep standing
> on the pavement and cars drift off into the unknown, but I doubt
> somebody driving an oxcart on a dirtroad would even notice.