A cross-sectional health survey comprising 633 male drivers showed that the frequencies of some complaints, for instance, pain in the shoulders and in the back of the neck, increased in older age groups. The frequencies of elevated blood pressure and electrocardiographic findings, on the other hand, tended to decrease among the older drivers. The percentage of drivers who had met with some kind of accident decreased among drivers aged 45-54 years. It was assumed that the results point toward health-based selection. The rate of turnover and its causes were studied in a cohort of 1,597 drivers. The results of the turnover study supported the findings of the health survey.