During which situation would you typically see amber lights?

Amber lights are commonly used in airport operations to indicate caution and to signal vehicles and personnel to approach with care. In the context of crossing service roads, amber lights serve as a clear warning to drivers and ground personnel that they should be alert, as they may be in proximity to runway areas where aircraft movements are taking place.

In contrast, landing and takeoff usually involve green lights that indicate the runways are clear and safe for those operations. Fueling operations might use red or other specific signals to indicate the need for heightened safety due to the flammable nature of fuel. Therefore, the use of amber lights specifically aligns with the caution required when crossing service roads amidst potential aircraft movement, reinforcing the need for vigilance in these areas.