Stefanie Medlin is the Founder and Chief Executive Officer of the California Alliance for Road Safety (CARS), Inc. and the National Alliance for Road Safety (NARS). She leads statewide and national efforts focused on evidence-based traffic safety education, injury prevention, and systems-level safety reform.

Stefanie holds a Master’s Degree in Health Education and is a Credentialed Certified Health Education Specialist (CHES). Her professional foundation is in public health program development, safety intervention design, and cross-sector government collaboration. Throughout her career, she has worked at the intersection of education, compliance, and public policy — designing and managing prevention-focused initiatives that reduce risk and improve measurable safety outcomes.

Her experience spans large-scale public health and safety programs in partnership with federal, state, and local agencies, courts, nonprofit organizations, and private stakeholders. Stefanie specializes in translating policy goals into structured, implementable programs that prioritize accountability, quality assurance, and continuous improvement. Her work reflects a prevention-science approach: identifying risk factors, strengthening protective behaviors, and implementing interventions that change outcomes over time.

The missions of CARS and NARS are rooted in these same principles. Under Stefanie’s leadership, the organizations advance modern, evidence-informed traffic safety strategies, expand community-based education, and support prevention-centered policy solutions that reduce crashes, injuries, and fatalities.

Stefanie believes meaningful road safety progress requires collaboration across disciplines — public health professionals, educators, courts, policymakers, researchers, and community leaders working together toward a common goal. Her leadership reflects a deep commitment to public service, measurable impact, and the belief that safer roads are built through education, accountability, and sustained systems change.