What does this traffic sign combination indicate?

This traffic sign indicates a rail crossing. It warns drivers of a railway track's potential intersection with the road. According to German traffic regulations, when you see this sign, you should reduce speed and be prepared to stop if a train is approaching. It's essential to remain vigilant and ensure that the crossing is clear before proceeding. The sign does not indicate a rail underpass or a train station, which is why understanding the specific meaning is crucial for safe driving near railways.