The traffic sign you referred to is known as "Note by verbal indication" (Sign Name: 1012-52).

This sign is typically used to indicate that a verbal instruction has been issued by a police officer or traffic control official. It serves as an alert to drivers that they should follow the specific instructions given verbally, even if these instructions differ from standard traffic regulations.

In Germany, it's essential to comply with these verbal directions as they take precedence over road signs and traffic lights. Failing to follow an officer's instructions can lead to penalties, including fines or other legal repercussions.

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