Almost all kinds of driver impairments increase accident risks. This study forms part of the European IMMORTAL (Impaired Motorists, Methods Of Roadside Testing and Assessment for Licensing) project. The study provides a cost-benefit analysis (CBA) of several possible policies of impairment countermeasures, and provides an insight into the socio-economic effects of policies. Special attention is paid to three countermeasures: mandatory eyesight testing, zero blood alcohol content (BAC) limit for young drivers in combination with increased random roadside breath testing, and the installation of alcohol locks for drivers with an alcohol problem. This analysis has been performed for Norway, Spain, the Netherlands and the Czech Republic. This report may be accessed by Internet users
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