Care transitions increase the risk of patient safety events, and pediatric patients are particularly vulnerable. This study used the Systems Engineer Initiative for Patient Safety approach to analyze care transitions, identify system barriers and solutions to guide efforts towards improving care transitions. Nine dimensions of system barriers and facilities in care transitions were identified: anticipation; ED decision making; interacting with family; physical environment; role ambiguity; staffing/resources; team cognition; technology, and; characteristics of trauma care.  Understanding these barriers and facilitators can guide future endeavors to improve care transitions.