What structural feature often accompanies runway centerline markers?

Runway centerline markers are critical for guiding pilots during takeoff and landing, especially under low visibility conditions. The structural feature that often accompanies these markers is surface painting. This is because the centerline markers themselves consist of solid white lines painted across the runway surface, providing a clear visual guide.

Surface painting is essential not only for the centerline but also for other markings that help in identifying the runway boundaries and assisting with safe movement on the runway. The clarity and contrast of the painted lines ensure that pilots can easily follow them during critical phases of flight, enhancing safety and operational efficiency.

While signage, curbing, and lighting systems are also important components of airport infrastructure, they serve different purposes. Signage provides additional information, curbing can delineate runway and taxiway boundaries, and lighting systems are used for enhancing visibility and safety at night or in poor weather. However, when specifically discussing runway centerline markers, surface painting is the most relevant structural feature.