Does the visible sign in the situation presented, warn you of the possibility of encountering frost or black ice on the road?

In the video you are driving on a two-way road outside a town, with a double solid line in the middle and safety barriers on both sides; on the right there is a yellow triangle with a snowflake - sign A-32 "frost on the roadway". It warns of frost or black ice that may occur on the road. The answer is: yes.

The Regulation on road signs and signals states that sign A-32 "frost on the roadway" warns of frost or black ice that may occur on the road. The road rises between the barriers, probably onto a bridge or flyover - a typical place for such a sign, because a structure suspended in the air cools from above and from below and gets covered with ice when an ordinary road is only wet. Outside towns black ice is dangerous: at 90 km/h a loss of grip means no control over the car, and the barriers leave no room to escape. Warning signs require you to exercise particular caution - when the temperature is close to zero, beyond the sign you slow down, drive smoothly, without sharp braking or quick lane changes, and leave a long following distance from the vehicle in front. If the car starts to slide, you do not brake in panic - you gently take your foot off the accelerator and hold the steering wheel straight.

Legal basis: § 12 para. 2 and § 3 para. 1 of the Regulation on road signs and signals