This report, Driving under the influence of drugs, alcohol and medicines in Europe – findings from the Druid project, presents the key findings from one of the most comprehensive research projects ever carried out in the EU on drugs (including alcohol) and driving.1 The DRUID research project was established in September 2006 with the aim of estimating the size of the drug-driving problem in a comparable way across Europe and to examine the range of appropriate countermeasures. The project ran for five years and involved 38 consortium partners from 17 EU member states and Norway. The project deliverables include 50 research reports and these inform its recommendations, which look at measures to combat alcohol-impaired driving, illicit drug-impaired driving and medicine impaired driving.2