What action is required when a flashing red light is observed?

When a flashing red light is observed, the required action is to immediately clear the runway or taxiway. This signal indicates a serious hazard where an aircraft or vehicle may be in imminent danger, and it communicates the need to vacate the area promptly to ensure safety. The flashing red light serves as a critical warning to all personnel that they must take action to prevent a collision or other dangerous situation.

Being aware of this signal is essential for maintaining safety around an airport environment, where quick response times can prevent accidents. Understanding that a flashing red light necessitates an immediate response helps ensure that all drivers operating in the area prioritize safety above all else.