A narrower runway can cause the illusion that the aircraft is:

When approaching a narrower runway, pilots may perceive their altitude incorrectly. The visual cues provided by the runway environment can create the illusion that the aircraft is higher than it actually is. This perception occurs because the runway appears to be smaller in width, leading to an interpretation that the aircraft is further from the ground than it truly is.

Pilots need to be aware of this illusion, as it can significantly affect their approach and landing decisions. If a pilot believes they are higher, they might inadvertently descend too late or fail to maintain the proper glide slope during landing, potentially leading to hazardous situations. Understanding visual illusions and their effects on situational awareness is crucial for safe flying.