The Impaired Driving Subcommittee (IDSC) would like to acknowledge the leadership and support of Earl Sweeney, the IACP Highway Safety Committee Chair and Assistant Commissioner of the New Hampshire Department of Safety.

The work of the IDSC was made possible through the volunteer efforts of Subcommittee members and through the financial support of the International Association of Chiefs of Police, Mothers Against Drunk Driving, and the National Highway Traffic Safety Administration.

The IDSC would like to recognize the special efforts of the Washington State Patrol Administrative Services Section for constructing this publication.

The opinions, findings, and conclusions expressed in the publication are those of the Impaired Driving Subcommittee members and not necessarily those of their employing agencies.