In this situation, are you warned that you are approaching a pedestrian crossing?

In the photo you are driving along a street in a town; on the right, on a fluorescent yellow background, there is sign A-17 "children" with a symbol of two running children, yellow railings separate the pavement from the roadway, and further on you can see sign D-1. Sign A-17 does not warn of a pedestrian crossing - it warns of a place used particularly often by children. The answer is: no.

The Regulation on road signs and signals states that sign A-16 "pedestrian crossing" warns of a pedestrian crossing, and sign A-17 "children" warns of a place on the road used particularly often by children or of the nearness of such a place, for example a school, a nursery school or a playground. The symbols of the two signs are similar, but on A-16 a pedestrian is walking on the stripes, and on A-17 children are running. The railings and the yellow background of the sign are additional signals that you are near a school. Beyond such a sign you take your foot off the accelerator, watch the pavement and the gates on both sides and are ready to brake - a child may run out from between parked cars suddenly and without checking the road, and the principle of limited trust tells you to expect this.

Legal basis: § 8 para. 1 and 2 of the Regulation on road signs and signals; Art. 4 of the Road Traffic Act (Prawo o ruchu drogowym)