I was driving the Gaspe coastal road once after an ice storm and we were on the road with a bunch of semis early in the morning. The switchbacks had massive sheets of ice coming off them over the sides. It was wild.
It wasn't so thick that driving over the shattered pieces was an issue but it was a sight to behold and turned a white knuckle drive into a real jaw clencher.
Was there for a family issue and had to be somewhere otherwise I wouldn't have been on the road that day at all, let alone first thing.