In the presented situation, do you have priority over the vehicle coming from the right?

In the photo you are driving along a street in a town; before the junction on the right there is a yellow diamond with a white border - sign D-1 "priority road" - and at the entrance of a side road on the right there is a red car. You have right of way over the vehicle coming from the right. 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, so vehicles from minor roads, marked with signs A-7 or B-20, give way to vehicles travelling on this road. The right-hand rule from the Road Traffic Act, according to which you give way to a vehicle from the right, applies only where signs do not set right of way differently. So your right of way is clear, but right of way is not a guarantee that others will respect it. The Act requires you to exercise particular caution when approaching a junction, and the principle of limited trust tells you to expect that the driver of the red car may pull out despite the sign - for example because they did not notice it. So you watch its wheels: as long as they are not moving, you drive on; when they start to move, you brake. In a collision, "I had right of way" will not repair your car or your health.

Legal basis: § 43 para. 1 and § 5 para. 5 of the Regulation on road signs and signals; Art. 25 para. 1 and Art. 4 of the Road Traffic Act (Prawo o ruchu drogowym)