A railway employee is waving a red lamp at a level crossing. What does this mean?

When a railway employee waves a red lamp at a level crossing, it serves as a warning signal. According to German traffic rules, this means you must stop and wait in front of the level crossing. The red lamp indicates that a train is approaching or it is not safe to cross. You are not allowed to proceed until the signal is cleared, even if the barriers are open or you do not see an approaching train. Passing despite this signal is dangerous and against the law. This ensures safety at railroad crossings. You answered correctly.