What does it indicate when runway lights change color on rollout?

When runway lights change color during rollout, it indicates that you have 2,000 feet of runway remaining. This specific signal is part of a standardized system that helps pilots assess their distance from the end of the runway. The colored lights serve as a visual cue for pilots to understand the remaining runway length while landing.

Understanding this can be critical for safety, especially in situations where a pilot needs to decide whether to stop or continue rolling out after touchdown. The other options may address aspects of runway operations, but they do not accurately represent the function of the color change in relation to assessing the remaining runway length.