In 1961, a new Austrian Road Traffic Act, the so called StVO 1960 was introduced. The main reason for this revised version of a Road Traffic Act was the increasing traffic after recovering from World War 2. In § 3 StVO the so called ?principle of trust? has been standardized. Long before, this principle has been deduced by the Austrian high court (the OGH) from a ?general behavior rule?, that demanded a thoughtful, observant and most of all a correct behavior from all the road-users. In the opinion of the OGH, it follows from that, that the road-users therefore can fully trust on the obedience of these rules. By enacting the StVO, the Austrian legislator replaced this general behavior rule by the principle of trust, expecting a drastic change in the jurisdiction of the OGH, which (for the moment) didn?t come. To be able to understand, why a drastic change in the jurisdiction couldn?t be expected, it is necessary to understand the meaning of the word ?trust? and the exact content of the ?principle of trust?. Further important aspects are, the special regulations in regard of a certain group of people (for example children) and most of all, the so called ?inherent barriers? of the principle of trust. Although the principle of trust has only been standardized in § 3 StVO, this principle is also known in other parts of our daily life, for instance in skiing, cycling or motorboat driving. The similarity of those areas of life was probably the main reason, for the enlargement of its area of application. Furthermore, the principle of trust is also restricting the duties of care of team members. The permission to trust in the accuracy of the outcome and the working method of your team member is a basic requirement to make the division of labor work.