When can flashing red lights be activated on an airside vehicle?

Flashing red lights on an airside vehicle serve a critical safety function by alerting others to potential danger or obstruction in the area. The activation of these lights is an important safety protocol, especially in the busy and often congested environment of an airport. When activated, the flashing red lights signal to other vehicles and personnel that there could be a risk, such as an obstruction on the runway or taxiway, a vehicle breakdown, or other situations that require heightened awareness and caution.

Flashing red lights indicate that immediate attention is needed and that others should approach the area with care or stop if necessary to avoid accidents. This ensures that the well-being of passengers, crew, and airside operators is prioritized, and it fosters a safer operating environment.

The other options do not align with the intended purpose of flashing red lights: signaling for other vehicles to stop is a function more associated with steady red lights or road signs; indicating readiness to depart is not relevant to the use of flashing red lights; and while visibility factors could influence operation hours, the necessity of these lights transcends just nighttime operations, making this an all-around safety feature regardless of the time of day.