What are the elevated flashing yellow lights at the intersection between taxiways and runways called?

The elevated flashing yellow lights found at the intersections between taxiways and runways are referred to as Runway Guard Lights. These lights play a critical role in enhancing safety on the airfield by providing a visual indication to pilots and vehicle operators that they are approaching a runway. The flashing yellow lights serve as a warning that they are in proximity to an active runway and should exercise caution.

The primary function of Runway Guard Lights is to ensure that both taxiing aircraft and ground vehicles are aware of their location relative to the runway and to prevent potential incursions. By being highly visible and distinct from other lights, they serve as an important alert mechanism, especially in low visibility situations or during nighttime operations.

In contrast, the other options do not describe lights that specifically serve this safety purpose at runway and taxiway intersections. For example, Airside Clearance Lights are designed to indicate permission for vehicles to enter or exit the airside area, while Approach Lights are used to assist pilots during the approach phase of landing, and Taxiway Markings denote the boundaries and directions on taxiways but do not involve flashing lights. Thus, Runway Guard Lights are the correct identification for the elevated flashing yellow lights at these critical intersections on an airfield.