Supervisors, primarily parents, have an important role in the learning to drive process for teen drivers. They are not only supervising teen drivers on a learner’s permit but also teaching driving skills to their beginning teenage driver. Parents also strongly support GDL;1 however, many parents do not fully understand the important role that they play and their responsibilities to ensure their teen is driving safely, especially in high-risk situations, such as driving at night. Alcohol impairs not only motor skills but also cognitive functions and can disrupt the ability of parents to talk effectively with the teen driver about safe driving and to supervise and guide their driving practice sessions. It makes sense that they should be restricted to a low or zero BAC so that they can process information and supervise their teen’s driving unimpaired by alcohol.