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

A red lamp waved by a railway employee at a level crossing is a clear signal that you must stop and wait before crossing. This warning indicates that a train is approaching or the crossing is not safe to pass. According to German traffic rules, ignoring this signal can be dangerous and is prohibited. You should only proceed when the signal is no longer shown and it is safe to cross. This rule helps prevent accidents at level crossings.