Summary of “Black Ice, Near-Death, and Transcendence on I-91”

Black ice means any thin, clear coating of ice, without the trapped air bubbles that render thicker ice cloudy.
Black ice often forms at night, when the dew point is near freezing and the cold pavement turns moisture to ice.
Most state police departments don’t list freezing rain as a cause or identify the kind of ice involved, so the danger of black ice goes unquantified.
On the highway, a driver from Miami coming up for the winter holidays who has never encountered black ice before may be more likely to slow down than a driver like me, who grew up with it.
With black ice, Patnoe said, “Once the grip sensors tell us it’s slippery, it’s usually too late.” The ice is already weaponized.
“Say it’s about ten degrees, a beautiful day,” Patnoe said, “And the sun is out. And the road surface is frozen. So the sun will pull that moisture out, and next thing you know you have black ice, especially on a high-speed road.” The friction from the tires of the eighteen-wheelers melts the ice; a spindrift of snow blows over the road and liquefies; the water spreads and freezes.
Did the professors have a solution for the problem of black ice on roads?
We slid backward down a snowy concrete drainage ditch, coming to a gentle stop behind the guardrail we had narrowly missed, where we were now shielded from another driver who might hit the same patch of black ice.

The orginal article.