The sign you are referring to, "Warnings of dangers through verbal indication 1007-31," is used in Germany to provide verbal warnings about potential dangers on the road. This sign typically features a triangle with an exclamation mark or other graphic symbols that indicate specific hazards that drivers need to be aware of, such as slippery roads, roadworks, or reduced visibility conditions.

The purpose of this sign is to alert drivers to exercise caution and be prepared for unexpected circumstances that may require them to adjust their speed or behavior on the road. It is crucial for drivers to pay attention to these warnings to ensure their safety and the safety of others.

If you have more questions about the sign or related traffic rules, feel free to ask!