IMMORTAL (Impaired Motorists, Methods of Roadside Testing and Assessment for Licensing) is a special EU research programme dealing with the accident risk associated with different forms of driver impairment. The project aims to investigate the influence of chronic and acute impairment in order to make a more accurate risk assessment, to recommend criteria for high risk categories, and to provide key information to support EU Policy on licensing and roadside testing. The IMMORTAL consortium comprised 10 partners from a range of European institutions with multi-disciplinary expertise. Co-ordination of IMMORTAL Project was first done by University of Leeds, and since October 1st 2004 taken over by the Danish Transport Research Institute. This report should be an executive summary and will include a short state of the art concerning the influence of chronic and acute driver impairment factors and the main results and recommendations derived from the different work packages and workshops. Information about exploitation possibilities, possible users and contact addresses should also be part of this final report.