Can you stop the vehicle on the hard shoulder in the presented situation?

In the photo you are driving on a road outside a town; on the right there is a yellow triangle A-6b "junction with a minor road on the right", and the right edge of the roadway is marked by a solid edge line, beyond which there is a grassy shoulder. You cannot stop the vehicle on the shoulder here. The answer is: no.

The Road Traffic Act prohibits stopping a vehicle on the roadway and on the shoulder next to a solid line marking the edge of the roadway, and the Regulation on road signs and signals states that marking P-7b "solid edge line" marks the edge of the roadway and also means that the driver of a motor vehicle must not drive onto the shoulder - since you must not drive onto it, you cannot legally stop on it. Sign A-6b adds a second reason: you are approaching a junction, and the Act prohibits stopping at a junction and less than 10 m from it. If you have to stop because of a breakdown, you move as far to the right as possible, switch on your hazard warning lights and place the warning triangle 30-50 m behind the car, because outside a built-up area a stationary vehicle on the roadway in a place where stopping is prohibited must be signalled. A planned stop is made in a car park or a lay-by.

Legal basis: Art. 49 para. 1 point 1 and 5 and Art. 50 para. 1 point 2 letter a and para. 2 point 2 letter a of the Road Traffic Act (Prawo o ruchu drogowym); § 86 para. 8 and § 5 para. 2 of the Regulation on road signs and signals