What is the caution zone for landings indicated by the yellow edge lights?

The caution zone for landings, indicated by yellow edge lights, is designed to inform pilots about the final segment of the runway that requires special attention during landing procedures. The correct answer signifies that the caution zone covers either the last 2,000 feet of the runway or half of the total length of the runway, emphasizing the crucial nature of this area for safe landings.

This zone is critical because it serves to alert pilots to potential changes in runway conditions, obstacles, or other factors that may affect their landing. Having yellow edge lights marks this specific area, ensuring visibility in conditions where pilots need to focus more intently, such as during low visibility or adverse weather.

The other options fail to capture the intended purpose and measurement of the caution zone effectively. For instance, suggesting just the last 1,000 feet of the runway underestimates the length needed for proper landing approaches, while indicating all of the runway does not narrow down the specific area that is meant to be a caution. Including the entire taxiway area would also misrepresent the focus area for landing, as that is not relevant for the caution lights intended for runway consideration.