When approaching a level crossing with infrequent train traffic, are you always required to check for any approaching trains?

Why?

Before entering the tracks, you must always check for approaching rail vehicles, regardless of how frequently trains use the line. Infrequent train services do not remove this duty. The B-20 stop sign visible in the photo also requires you to stop before the crossing.

art. 28 ust. 1 Prawa o ruchu drogowym