J.H. Hedlund, R.G. Ulmer and D.F. Preusser, U.S. Department of Transportation, National Highway Traffic Safety Administration, September 2001
This chapter examines several factors that may have contributed to the youth drinking and driving decrease. These factors include very specific legislation directed at youth drinking or driving after drinking, programs to provide youth with the knowledge, skills and attitudes to make healthy choices in many areas including drinking and driving and broad factors that may have influenced youth attitudes and behavior. Some of these factors have been evaluated extensively with high-quality studies using accurate data; others have not. As a result, the effects of some factors are known quite accurately while the influences of others are highly speculative.