The sign "Notice by verbal indication 1012-38" indicates that the driver should pay attention to the verbal instructions given by a traffic officer or authorized personnel. This sign typically signifies that there may be specific instructions regarding traffic control or safety that need to be followed, which can be critical in situations where traffic might be altered, such as during roadworks, accidents, or certain events.

Drivers should be prepared to follow any directions provided verbally, as these instructions can override standard traffic signs or signals for the safety of all road users. Always remain alert to the presence of traffic officers and be ready to comply with their guidance.