From the threshold to 3000 feet remaining, runway centerlights are which color?

From the threshold to 3000 feet remaining, runway centerlights are which color?

• A. White
• B. Red
• C. Alternating red/white
• D. Green

Answer: (A)

Runway centerline lights are designed to provide a distance cue along the landing runway. They are white for the first 3,000 feet from the threshold, then switch to alternating red and white for the next 2,000 feet, and finally become solid red for the last 1,000 feet. This pattern helps you gauge how much runway remains, especially in low visibility. Therefore, from the threshold to when 3,000 feet remain, the centerline lights are white.

Runway centerline lights are designed to provide a distance cue along the landing runway. They are white for the first 3,000 feet from the threshold, then switch to alternating red and white for the next 2,000 feet, and finally become solid red for the last 1,000 feet. This pattern helps you gauge how much runway remains, especially in low visibility. Therefore, from the threshold to when 3,000 feet remain, the centerline lights are white.