What does a solid white line indicate on the airfield?

A solid white line on an airfield indicates the edge of the runway or taxiway. This is crucial for safe operations as it helps pilots and ground vehicle operators maintain awareness of their positions relative to the runway or taxiway boundaries. The solid line visually delineates where the operational surface ends, guiding aircraft during taxi to avoid going beyond safe limits.

Understanding the significance of these markings is vital for ensuring the safety and efficiency of airfield operations. They serve as a clear boundary that reinforces the need for caution, especially in busy airfield environments where visibility may be compromised or where situational awareness must be maintained. This clear definition helps prevent accidents that could occur from moving too close to or onto unpaved or unsafe areas.

In contrast, other markings, while still important, serve different purposes and do not communicate the same critical boundary information that a solid white line does.