The traffic sign you referred to is called "Symbol 1010-66," which indicates a "No parking" restriction. This sign means that parking is not allowed in the area where the sign is posted.

In Germany, this sign is used to ensure that roadways remain clear for traffic flow and safety. Drivers must find alternative parking options that are not in the restricted zone whenever they see this sign.

If you have further questions about parking rules or any other traffic regulations, feel free to ask!