A summary of three major areas of research on the driver. I: The psycho-social adjustments of drivers in relation to accidents. II: Alcohol and highway accidents-a summary of present knowledge. III: The older driver and accidents.

Attitudes and personal characteristics of drivers are the most important factors in accident causation. Only a few carefully controlled studies have been made, however, to test this assumption. The purpose of this paper is to evaluate some of the experiments and to review the findings from some selected studies.