What is the purpose of FAA threshold lights?

The purpose of FAA threshold lights is to indicate the approach end of a runway. These lights are a crucial navigation aid for pilots, as they help delineate where the runway begins from the air, providing visual guidance during the approach phase of landing. The colors and configuration of these lights are designed to enhance visibility, particularly in low visibility conditions, ensuring that pilots can safely identify the point at which they are expected to begin their landing.

In addition, while other options mention takeoff zones, runway ends, and taxiing guidance, none serve the specific function of clearly marking the threshold of the runway in a visual format as effectively as threshold lights do. This distinct purpose is essential for ensuring safe aircraft operations as they approach an airport runway.