How is the runway threshold marked?

• A. Green longitudinal lines
• B. White longitudinal lines indicating runway width
• C. Red marks on the edge
• D. Yellow stripes

Answer: (B)

The runway threshold is marked with white longitudinal lines that indicate the width of the runway. These markings are essential for pilots as they signify the beginning of the runway where landing and takeoff occur. The white lines help clarify the usable area of the runway and assist in ensuring that aircraft correctly align during takeoff and landing maneuvers.

The specific width of the lines can vary based on the type of runway and its classification, but the use of white is standardized in aviation to ensure high visibility and clear communication to flight crews. The presence of these markings is crucial for maintaining safety and efficiency in airport operations, as they guide pilots in determining their proper landing and takeoff paths.

Other markings, such as those in green or red, serve different purposes and don't indicate the threshold specifically, contributing to the overall airport environment, but not in the same way that white longitudinal lines do for runway thresholds.