Inclusion Criteria:  Informed consent as documented by signature. In possession of a Swiss or EU driving license for at least two years. At least driving 1'000 kilometers per year. No special equipment needed when driving. Drinks alcohol at least occasionally (moderate/social consumption). Fluent in (Swiss) German and no speech impairment. Lives in or near Bern.  Exclusion Criteria:  Health concerns that are incompatible with alcohol consumption. Any potential participant currently taking illegal drugs or medications that interact with alcohol. Women who are pregnant or breast feeding. Intention to become pregnant during the course of the study. Teetotallers (alcohol abstinent persons). Alcohol misuse (excessive alcohol consumption habits/risky drinking behaviour (according to WHO definition) and/or PEth in capillary blood > 210 ng/mL at first visit. Known or suspected non-compliance or drug abuse. Inability to follow the procedures of the study, e.g., due to language problems, psychological disorders, dementia, etc. of the participant. Participation in another study with investigational drug within the 30 days preceding and during the present study.