If you need to park the car on a road marked like this because it has broken down, are you obliged to place a warning triangle behind it within a distance of 100 m?

In the photo you are driving in fog along a dual carriageway road, with signs D-7 "expressway", D-43 "end of built-up area" and a board with the lane layout next to it; a car is driving in front of you. When you stop a vehicle that has broken down on an expressway, you place a warning triangle 100 m behind it. The answer is: yes.

The Road Traffic Act requires you to signal that a vehicle is stationary because of a breakdown or an accident on a motorway or an expressway in every case - by switching on the hazard warning lights, or, if the vehicle does not have them, the sidelights (position lights), and by placing a warning triangle 100 m behind the vehicle, on the roadway or on the shoulder, depending on where the vehicle has come to a standstill. The Regulation on road signs and signals states that sign D-7 means the start or continuation of an expressway. On ordinary roads outside a built-up area the triangle is placed 30-50 m behind the vehicle; on an expressway, with speeds of up to 120 km/h, it must stand further away.

Legal basis: Art. 50 para. 1 point 1 and para. 2 point 1 letter b of the Road Traffic Act (Prawo o ruchu drogowym); § 48 para. 1 of the Regulation on road signs and signals