What do Wig Wags indicate at an airport?

Wig Wags primarily refer to the yellow flashing Runway Guard lights found at airports. These lights are strategically placed at runway entrances to alert vehicles and personnel that they are approaching an active runway. The flashing yellow lights serve as a warning and are an essential part of airport safety protocols, helping to prevent unauthorized or unsafe access to the runway when an aircraft is preparing for takeoff or landing.

The importance of Wig Wags cannot be overstated, as they are a critical visual indicator in the airside environment, contributing to the overall security and operational efficiency of airport operations. Their distinctive flashing pattern distinguishes them from other lights, making it clear to airside personnel that immediate attention is required to ensure safety when crossing runways.