When are you allowed to cross a level crossing with flashing lights but no barriers after a train has passed?

In German traffic rules, a level crossing with flashing red lights but no barriers means you must wait until the flashing red light stops before crossing. The flashing red light is a clear signal that a train is approaching or recently passed and it is not safe to cross yet. Only when the flashing red light goes out is it safe and legal to proceed. Crossing immediately after the train has passed but while the red light is still flashing is dangerous and prohibited because another train could be coming. Also, you cannot rely on oncoming traffic moving as a signal to cross. Always wait for the flashing red light to stop. This ensures maximum safety at level crossings.