In this situation, are you allowed to change to the right traffic lane?

In the video you are driving in the middle of three lanes of a one-way roadway among blocks of flats; the lanes are separated by broken lines, and sign F-10 before the junction shows that the left lane leads left or straight on, the middle lane straight on, and the right lane only to the right. You are allowed to change to the right lane - if you intend to turn right. The answer is: yes.

The Road Traffic Act allows a driver to change lanes if they exercise particular caution and give way to a vehicle travelling in the lane they intend to move into; the Regulation on road signs and signals states that sign F-10 shows the permitted directions of travel from individual lanes, and that broken line P-1 marks lanes and does not prohibit crossing it. Nothing here prohibits changing lanes: the line is broken, and sign F-10 only specifies that from the right lane you will go right - if you want to go straight on, you stay in the middle lane. Before changing lanes you check the interior mirror, the right exterior mirror and the blind spot over your shoulder, switch on the right indicator in good time and move over smoothly, without forcing anyone to brake.

Legal basis: Art. 22 para. 1, 4 and 5 of the Road Traffic Act (Prawo o ruchu drogowym); § 72 para. 1 and § 86 para. 1 of the Regulation on road signs and signals