this is the place where a land road intersects at one level with a railway or with another road lying on an independent track, and is indicated by a corresponding road sign .
this is the place where a land road and a railway intersect at the same level, and which is not indicated by a road sign .
this is the place where a land road with a railway intersects at the same level, and which is always indicated by a road sign "No stop-motion is prohibited" .