[Errant]

They have something called “black ice” in Alaska which leads to brown stains on the driver’s seat.

[Paladin2]

Though the coefficient of friction never gets to zer0, it can easily be below what you need (and want).

The worst is when the surface temp is near freezing.

[chickenlips]

They have that where ever there is freezing rain and night and the staining effect is the same everywhere.

[EBH]

We get that here in northern Ohio! Darn snowmist settling on cold surfaces off the lake....