Intervention or evaluation studies represent a small proportion of traffic psychology research. The current study evaluated the effectiveness of a road safety intervention by measuring attitudes toward unsafe driving behaviors and risk perception. A sample of high school students (n = 133) participated in a road safety intervention program focusing on attitudes and risk perceptions of young people as novice drivers, pre-drivers, and passengers. This sample was compared with a matched sample of students who did not take the program (n = 172) on their attitudes and perceived risk toward unsafe driving, both prior to the program (T1), immediately after the program (T2), and at 6-week follow-up (T3). While no changes in attitudes toward unsafe driving were found for the control group, the intervention group reported riskier attitudes toward unsafe driving behaviors from T1 to T2 and T3. No differences were found from T1 to T3 in perceived risk toward unsafe driving for either the intervention or control groups. Implications of the study include encouraging a higher rate of road safety program evaluations, leading to better understanding of the effectiveness of road safety intervention programs and how they may be designed and delivered to ensure lower engagement in unsafe driving behaviors by young drivers.