Abstract
Mobility is an important factor of spare time behaviour in our society. Even young people take part in this mobility using various vehicles, and a higher accident risk for this population is well known. In this context a lack of driving practice and a use/misuse of various drugs is significant. The knowledge about drug consumption among young people points out that alcohol and cannabis are of great importance, but other drugs, for example "Designer drugs" ("Ecstasy"), are relevant as well. With a special point of view to the legal basis of punishing the consumption of psychoactive substances by traffic participants, it was required to get a survey of the participation in traffic after the consumption of "Ecstasy" in Cologne.