Are you allowed to make a U-turn at this junction?

In the photo you are approaching a junction on a country road; on the right there is a direction sign to a town, and on the left an intersecting road goes off. There are no B-23 or B-21 signs here; the double solid line P-4 ends before the junction, and at the junction itself the directions are separated by a broken line, which you may cross. You can make a U-turn at this junction. The answer is: yes.

The Road Traffic Act prohibits U-turns only in a tunnel, on a bridge, on a flyover, on a one-way road, on a motorway, on an expressway except at a junction, and where it would endanger safety or obstruct traffic. An ordinary junction on a two-way road is not one of these places. Before you make a U-turn, you make sure that no one is coming from any direction, and you signal the manoeuvre with your left indicator.

Legal basis: Art. 22 para. 5 and 6 of the Road Traffic Act (Prawo o ruchu drogowym); § 86 para. 1 and 5 of the Regulation on road signs and signals