Are you entitled in this situation, to enter the road beyond this vertical sign, if you do not pose a traffic problem to other vehicles?

In the video you are driving along a street next to a park; on the right there is a round red sign with a white horizontal bar - B-2 "no entry" - placed at the entrance to a road on the right, which is separated from your roadway by an area closed to traffic, marked with white diagonal stripes. You are not allowed to enter the road beyond this sign, even if you would not obstruct other traffic - the prohibition is unconditional. The answer is: no.

The Regulation on road signs and signals states that sign B-2 "no entry" means that vehicles are prohibited from entering the road or roadway from the side where the sign is placed; a plate under the sign may exempt certain vehicles from the prohibition, but there is no such plate here. Sign B-2 is most often placed at the exit end of a one-way road - entering would mean driving against the traffic, straight towards vehicles whose drivers do not expect anyone coming from the opposite direction. The condition "if you do not obstruct traffic" applies to other situations, for example turning on a green filter arrow, not to prohibitory signs. You drive on straight ahead and look for the correct entrance to this street from the side where sign D-3 with a white arrow stands.

Legal basis: § 17 para. 1 of the Regulation on road signs and signals; Art. 5 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)