Originally Posted by
FBinNY
Many years ago driving with a friend in his 4WD jeep on a "black ice" day, I commented that he should slow down and keep his eyes open because there was a decent amount of ice forming. His "don't worry, I have 4 studded tires on this" said just about 2 minute before the road curved and we didn't, ending up tilted about 45° in a ditch. It was a cold walk in the rain.
Ugh! That reminded me of one early morning pre-dawn drive to the ski area in my Jeep.
We were cruising along I-70 @ 10,000' doing 45mph on wet road (I thought) when I noticed up ahead a car pulled onto the road from the right. Odd, I thought; I don't recall an entrance ramp there. As I slowed to allow the car to merge, I suddenly realized we were on black ice!

I managed to stay in my lane and keep the headlights pointed in the general direction of travel as we slid around trying not to rear-end the car merging. I also realized (from the tracks) there was no intersection; That car had run off the road and slid back on! At this same time I saw that the sleeping idiot (ex-GF) in my passenger seat had removed her seatbelt.

So there was absolutely nothing that would have stopped her from going into the windshield if we had hit the car ahead.