Focusing on state and local efforts to reduce underage drinking, this report is a product of a joint project of the National Association of Governors' Highway Safety Representatives (NAGHSR) and the National Association of State Alcohol and Drug Abuse Directors (NASADAD). Part of the project included a survey of the memberships of both NAGHSR and NASADAD designed to assess what states were doing to prevent underage drinking and to determine the extent of interagency cooperation with these efforts. The 10 case studies featured in this report were chosen from the efforts described by survey respondents to the question, "Can you identify current efforts to reduce underaged drinking in your state that you consider to be particularly effective or promising?" Phone interviews were conducted with program coordinators during October and November of 1994. Selections included in this report were chosen to represent a broad range of strategies and approaches to prevent underage drinking throughout the country. Projects were included from North Dakota, New York, New Jersey, Massachusetts, Virginia, Washington, Maryland, California, Minnesota, and Ohio. Appendices are (1) program contacts, (2) resources, (3) NAGHSR membership list, (4) NASADAD membership list. (JBJ)