Definition
A traffic management evaluation conducted by Air Traffic Control to estimate the operational effects of a proposed reroute before it is implemented. The assessment looks at how the reroute would affect traffic flow, sector workload, fuel and time impacts on affected flights, and the overall efficiency of the National Airspace System.
Plain English
Before air traffic controllers send a group of flights along a different route — usually to avoid weather, congestion, or a closed area — they study what that change would actually do. The Reroute Impact Assessment is that study.
Context Anchor
Seen in traffic flow management, weather reroutes, route advisories, and discussions about changing aircraft routes across busy airspace.
Why Pilots Care
Confirms the new route keeps the flight within fuel limits and arrival requirements.
Intuition Check
Impact does not mean a physical hit or collision here. It means the operational effect a reroute may have on flights, controllers, airspace, timing, and fuel.
Example Sentence 1
Traffic management completed an RRIA on the proposed southern reroute and found the delay savings outweighed the added fuel burn for most affected flights.
Example Sentence 2
After reviewing the RRIA, the pilot confirmed sufficient fuel remained for the arrival.