In the event of immobilisation of a vehicle on a level crossing, are you obliged to warn the rail vehicle driver if it impossible to remove the vehicle from the level crossing?

Why?

If your vehicle becomes immobilised on a railway crossing, you must remove it from the tracks immediately. If that is impossible, you must warn the driver of the rail vehicle about the danger. This also applies to the crossing with barriers shown in the photo.

Art. 28 ust. 4 Prawa o ruchu drogowym