At what distance behind a broken-down passenger car, parked on a motorway, should you place a warning triangle?

In the photo you can see a motorway roadway between noise barriers; a white car with an open tailgate is standing in the right-hand lane, and a warning triangle has been placed far behind it. Behind a broken-down car standing on a motorway you place the triangle at a distance of 100 m - answer B. The distance of 30-50 m (A) applies on ordinary roads outside a built-up area, and 150 m (C) does not appear in the regulations.

The Road Traffic Act requires you to signal a vehicle stopped because of a breakdown or accident on a motorway or expressway in every case - by switching on the hazard warning lights, or the sidelights (position lights) if the vehicle does not have hazard warning 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. At 140 km/h a car covers 100 m in less than 3 seconds, which is why the triangle must stand so far away. When you walk to place it, you put on a high-visibility vest and stay behind the safety barrier.

Legal basis: Art. 50 para. 1 point 1 and para. 2 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)