At the entrance to an industrial estate, there is a St. Andrew's Cross with the supplementary sign "Industrial estate, rail vehicles have precedence". What must you remember?

Your selected combination is correct because it emphasizes the importance of being cautious and aware of rail vehicles when approaching level crossings marked by a St. Andrew's Cross. In Germany, the St. Andrew's Cross signals that there is a level crossing with potential rail traffic.

1. Approaching level crossings at moderate speed is crucial as it allows drivers to react quickly and safely to any oncoming trains.
2. Rail vehicles indeed have precedence at all level crossings, meaning that they take priority over road traffic. This rule ensures safety at intersections where road and rail traffic intersect, reducing the risk of accidents.

Remembering these points enhances driver awareness and safety, which are essential aspects of German road regulations.