What is the color of threshold lights?

What is the color of threshold lights?

• A. Amber
• B. Green
• C. Blue
• D. Red

Answer: (B)

Threshold lights are green because they mark the beginning of the usable runway for landing. This color cue helps pilots quickly identify where the landing surface starts, distinguishing it from the rest of the runway and from taxiways. The other colors have different roles—blue lights mark taxiway edges, white lights line the runway edges, and red lights indicate the far end of the runway—so green specifically signals the threshold.

Threshold lights are green because they mark the beginning of the usable runway for landing. This color cue helps pilots quickly identify where the landing surface starts, distinguishing it from the rest of the runway and from taxiways. The other colors have different roles—blue lights mark taxiway edges, white lights line the runway edges, and red lights indicate the far end of the runway—so green specifically signals the threshold.