In incident command, which structure is designed to coordinate actions from multiple agencies under one plan?

• A. Line Command
• B. Area Command
• C. Single Command
• D. Unified Command

Answer: (D)

Unified Command brings representatives from all involved agencies together to coordinate actions under a single plan. When multiple agencies—such as fire, police, EMS, and public works—are necessary at an incident, they form one command structure so decisions reflect shared priorities, objectives, and resource needs. This creates a common operating picture and an integrated incident action plan, eliminating conflicting orders and ensuring everyone works toward the same goals. For example, a large incident like a major roadway crash with fire rescue, police for traffic control, and public works for debris removal benefits from Unified Command because all agencies contribute to setting objectives and coordinating responses within one plan. The other options don’t provide this cross-agency coordination: a single command is led by one agency; area command manages multiple incidents in a geographic area but not the unified multi-agency planning; line command refers to a direct chain of command within a single agency.