In Reply.— Dr Laws has a good idea. Sound public health concepts often gain wide acceptance because they appeal to different constituencies for different reasons. In fact, the demonstration that passenger restraint systems improve behavior of preschool children has been used successfully in the promotion of car safety seat use.1 No doubt, the perennial concern regarding student behavior might be used to advantage by those of us convinced that seat belts offer crash protection. Although there have been occasional intervention studies addressing deportment on the school bus,2 I am unaware of any in which the effect of seat belts has been looked at specifically.