What does a yellow-painted marking signify on the runway?

A yellow-painted marking on the runway is used to signify areas that require caution or should be avoided. These markings are designed to enhance safety by alerting pilots and vehicle operators to specific conditions, such as potential hazards or areas where they should not taxi or park.

In terms of runway operations, yellow markings are crucial for guiding movement and ensuring that all aircraft and ground vehicles remain in designated areas, thereby reducing the likelihood of accidents. The use of yellow paint effectively communicates important information to those navigating the airport environment, reinforcing safe operational practices.

The other options do not accurately reflect the function of yellow markings on runways. Emergency landing zones, safety and service areas, and rest stops for vehicles have distinct identifiers and purposes that differ from the cautionary intent of yellow-painted runway markings.