What color are lead on / lead off high speed taxiway lights?

• A. Alternating Yellow / Green lights
• B. Blue and White
• C. Red and White
• D. All Green

Answer: (A)

Lead-on and lead-off high-speed taxiway lights are designed to guide an aircraft from the runway to the taxiway exit (and vice versa) when exiting at high speed. The color pattern is chosen to be highly visible and quickly recognizable as a guidance path distinct from other lights.

They use alternating yellow and green lights along the path. The green lights align with the familiar taxiway centerline, while the yellow elements flag this as a lead-on/lead-off sequence, helping pilots confirm they’re on the correct exit path as they decelerate and steer onto the taxiway.

Other lighting serves different purposes—blue lights mark taxiway edges, white lights indicate standard runway centerline or other runway lighting, and red/white patterns are used for boundary or safety-related cues—so the alternating yellow and green combination is the specific cue for lead-on/lead-off high-speed taxiway guidance.