When must you wait at this traffic sign?

This traffic sign is a level crossing sign without barriers. According to German traffic rules, you must wait in all these situations to ensure safety:

1. When a railway employee is signaling with a white-red-white flag, it indicates that a train is coming or other danger, so you must stop.

2. When the level crossing cannot be crossed without stopping on it, for example, if traffic ahead is congested, you must wait before entering to avoid blocking the crossing.

3. When a rail vehicle (train, tram) is approaching, you must always stop to let it pass.

These rules ensure safe passage at unprotected railway crossings since there are no barriers to physically block traffic. Always be vigilant and ready to stop when these signs and conditions apply.