The core activity of the company 'Verkehrspsychologie Graber GmbH' is the preparation of traffic psychological expert opinions and assessments to examine and evaluate the fitness to drive of individuals. This includes, in particular, the assessment of performance capabilities in terms of brain functions, such as concentration, attention, visual perception and reaction ability, as well as the examination of the personal suitability for driving. The expert opinions are usually carried out on behalf of authorities when there are justified doubts about a person's fitness to drive.