Abstract
Emotional illness as it affects driving ability and accident risk is illustrated. A brief summary of the major classical types of mental illness in adults is presented, including schizophrenia, affective or manic-depressive disorders, character disorders or sociopathic personality patterns, psychoneuroses, alcoholism, and senile psychoses. The characteristics of paranoid thinking, suicidal tendencies, impulsiveness, and violent or aggressive behavior against others are cited as important factors in evaluating crash risk.