In this situation, are you driving on a road with right of way?

In the video, you are driving on a road in a town next to a park and approaching a junction; on the right there is a yellow diamond with a white border - sign D-1 "priority road" - with plate T-6a, on which the thick line runs straight on and thin lines branch off to the sides. You are driving on a priority road. The answer is: yes.

The Regulation on road signs and signals states that sign D-1 marks the beginning or continuation of a priority road, and plate T-6a placed under it shows the actual course of the priority road through the junction: the priority road is marked with a thick line, the minor roads with thin ones. Since the thick line runs straight on, when you go straight on you stay on the priority road, and vehicles from the side roads - marked at their entries with signs A-7 or B-20 - must give way to you; the right-hand rule from the Road Traffic Act does not apply here. Right of way does not release you from particular caution when approaching the junction: you watch the side entries and are ready to brake if someone comes out without stopping, because the principle of limited trust applies even when you have right of way.

Legal basis: § 43 para. 1-3 of the Regulation on road signs and signals; Art. 25 para. 1 and Art. 4 of the Road Traffic Act (Prawo o ruchu drogowym)