However, I have divided the signs into several additional categories and I've placed each sign where it most logically belongs regardless of its official designation. In the German traffic code, each sign is assigned an official number. This number is used on traffic tickets and accident reports when a sign is involved in the incident. These are black and white rectangular or square signs mounted below the parent sign. These signs modify or give additional information regarding the condition shown on the parent sign such as exemptions, restrictions, or more specific details.
Supplemental signs use symbols wherever possible.
However, many supplemental signs use words. This sign marks an area where caution should be used. It is rarely used by itself. Instead, a supplemental sign is usually mounted beneath this sign with information on a specific hazard for which no other sign exists. Rough road edge Accident hazard Marks an area where a high number of accidents have occurred.