What should be done if braking action results indicate "poor"?

When braking action results indicate "poor," informing pilots to exercise caution is critical. This ensures that pilots are aware of potentially hazardous runway conditions, allowing them to prepare for challenges during landing or takeoff. By relaying this information, air traffic controllers help maintain safety by prompting pilots to adjust their approach, speed, or landing technique as necessary.

Operational decisions like allowing normal operations or changing the runway status may not be appropriate because poor braking action directly affects aircraft handling and may lead to unsafe situations if pilots are not adequately warned. Closing the runway altogether could be unnecessary, especially if conditions could improve or if the runway is still usable for certain aircraft under specific circumstances. Therefore, communicating the "poor" braking action to pilots is the most prudent course of action to ensure safety while maintaining situational awareness.