The study investigated age and sex in the control of an automobile under normal driving conditions. Its major purpose was to gather baseline data for a driver license, road testing program. Forty volunteer subjects (10 men and 10 women over 30, 10 men and 10 women under 30) drove a specially instrumented car over an interstate highway course and a heavily traveled urban course. The following variables were measured: total trip time, miles traveled, speed changes, lane changes, fine steering reversals, accelerator reversals, brake applications, and average speed. Several differences were found between vehicle control patterns of the men and women. Several smaller differences appeared between age groups. Finally, a comparison of interstate data with that of a previous study revealed consistency between groups, but a significant difference with respect to lane changes. As expected, the type of roadway had a profound effect on the control patterns of all subjects. (Author/BP)