Are you warned of a significant elevation of the road in this situation?

In the video you are driving along a road with barriers, and on both sides of the roadway there are yellow triangles with the symbol of a car on a slope - signs A-23 "steep climb". So you are being warned that you are approaching a significant rise in the road. The answer is: yes.

The Regulation on road signs and signals states that sign A-23 "steep climb" warns of a significant rise in the road, and if there is a T-9 plate under the sign, it shows the actual gradient of the climb; sign A-22 "dangerous descent", in turn, warns of a significant downward slope. On the sign, the car is going uphill, to the right - on A-22 it would be going downhill. The Road Traffic Act prohibits overtaking when approaching the crest of a hill and requires you to adjust your speed to the shape of the terrain. Before the climb you change down a gear in good time, so that the engine does not lose power, increase your distance from the vehicle in front and do not start overtaking, because you cannot see the road beyond the crest.

Legal basis: § 10 para. 5 of the Regulation on road signs and signals; Art. 24 para. 7 point 1 and Art. 19 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)