Abstract
This synthesis provides an overview of the state of the practice regarding the interoperability between state and local safety data and highlights agency practices that support a data-driven safety program on all public roads. Results of this synthesis found that in terms of interoperability between state and local agencies, agencies are more advanced for crash data than roadway or traffic data. Data for this study were collected through a literature review, interviews with leading agencies, and a survey of all state departments of transportation. (Author/publisher)