Threshold lights may protrude above the clearway plane if their height above the end of the runway is 26 inches or less and if they are located where?

Threshold lights may protrude above the clearway plane if their height above the end of the runway is 26 inches or less and if they are located where?

• A. To each side of the runway.
• B. Directly above the end of the runway.
• C. Along the centerline.
• D. At the edges of the pavement.

Answer: (A)

Threshold lights that rise above the clearway plane are allowed only under a specific setup: the light must be 26 inches or less above the end of the runway and must be located on each side of the runway. This placement keeps the lights out of the central approach/departure path while still allowing some protrusion when very short. If the lights are directly above the end of the runway, along the centerline, or at other non-side locations, they don’t meet the required arrangement and aren’t allowed to protrude above the clearway plane. So, the correct placement is on both sides of the runway, with a height of 26 inches or less.

Threshold lights that rise above the clearway plane are allowed only under a specific setup: the light must be 26 inches or less above the end of the runway and must be located on each side of the runway. This placement keeps the lights out of the central approach/departure path while still allowing some protrusion when very short. If the lights are directly above the end of the runway, along the centerline, or at other non-side locations, they don’t meet the required arrangement and aren’t allowed to protrude above the clearway plane. So, the correct placement is on both sides of the runway, with a height of 26 inches or less.