This paper presents the findings and lessons from a community prevention trial involving three experimental communities in the United States to reduce alcohol-involved trauma. The paper provides recommendations for other community prevention efforts. Effectiveness was demonstrated by: (a) 78 fewer alcohol-involved traffic crashes as a result of the Drinking and Driving Component alone (approximately a 10% reduction); (b) a significant reduction in underage sales of alcohol, i.e. off-premise outlets sold to minors about one-half as often as in comparison communities; (c) increased implementation of responsible beverage service policies by bars and restaurants; and (d) increased adoption of local ordinances and regulations to reduce concentrations of alcohol outlets.