Another Road to Safety (ARS) is a prevention and early intervention program of family support services for children who are at high risk for abuse and neglect in Alameda County, California, funded by Proposition 10 of the Children and Families Act of 1998. ARS is a collaboration between First 5 Alameda County's program Every Child Counts, the Alameda County Social Services Agency, and two community-based organizations. This article describes how these entities worked collaboratively to facilitate systems change in six areas: (1) strengthening prevention as part of a continuum of care; (2) improving service quality through reflective supervision; (3) improving provider capacity to deliver quality services; (4) increasing coordination and communication between agencies; (5) developing infrastructure to support high-quality coordinated services; and (6) leveraging resources for sustainability. The collaborating agencies discovered that sustaining a community-based model of prevention required a thorough understanding of the risk levels of families, the ability to fully engage families in the program, and the ability to triage families to the appropriate levels of care.