You intend to go straight ahead. Are you obliged to yield the right of way to the vehicle approaching from the left?

In the video, you are driving a lorry on a road marked with sign D-1 "priority road", intending to go straight on; a passenger car from a minor road is approaching the junction from the left. You are not required to give way to it. The answer is: no.

The Regulation on road signs and signals states that sign D-1 marks the beginning or continuation of a priority road, and the Road Traffic Act states that road signs take precedence over the general traffic rules. The general right-hand rule does not apply here: you are on a priority road, so vehicles entering from intersecting roads marked with sign A-7 "give way" or B-20 "STOP" must let you pass - regardless of whether they are coming from the left or from the right. The car from the left gives way to you all the more. Right of way does not release you from caution: as you approach the junction, you watch whether the driver of the passenger car really slows down and stops - if it looks like the driver has not noticed you, you brake, because a lorry has no chance of avoiding a collision at the last moment. The plate under sign D-1 shows the course of the priority road - it does not lead to the left, where the car is coming from, so it is the car that gives way.

Legal basis: § 43 para. 1 and 2 and § 5 para. 5 of the Regulation on road signs and signals; Art. 5 para. 1 and Art. 25 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)