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 answer is correct because the St. Andrew's Cross (Andreaskreuz) is a traffic sign at level crossings indicating that drivers must give way to rail vehicles. According to German traffic rules, you must approach such crossings at a moderate speed to be able to stop safely if a train is coming (rule 1). Additionally, rail vehicles always have precedence at level crossings marked with a St. Andrew's Cross (rule 2). The third option is incorrect because motor vehicles never have precedence at these marked level crossings, regardless of the presence or absence of a St. Andrew's Cross. Remembering these rules helps ensure safety at level crossings, especially in industrial areas where rail vehicles may be common.