The project is an independent evaluation of a driver improvement program for unexceptional adult drivers, offered on a pilot basis in 1972-73 by Ford Motor Company to its employees. The program was conducted using four treatment groups which received different amounts of retraining (N=750). It was found that two treatments consisting of several hours of classroom and on-street instruction resulted in 30-40 percent increases in mean group score on an observational test of on-street performance. A smaller but still statistically significant increase was found for a third treatment comprising a self-teach course, but a control group showed no change. Limited retesting three months after posttest suggested that the measured improvements were sustained for the two groups who were actively trained. (NTIS)