What happens if no red flag is displayed near a yellow-red flag?

The correct answer indicates that if no red flag is displayed near a yellow-red flag, you should proceed at restricted speed. This situation suggests that while caution should be exercised due to the presence of the yellow-red flag, there are no additional restrictions or hazards indicated by a red flag.

Proceeding at restricted speed means you should be prepared to stop within half the distance of your sighting, which allows for a heightened level of awareness and readiness for any unexpected situations, such as encountering a signal change or an obstacle on the track. This protocol ensures safety without the need to stop entirely when no additional warnings (like a red flag) are present.

Choosing to stop and wait for instructions, accelerate past the flag, or notify the control center would not align with the established operating procedures when no red flag is displayed. Each of those actions could lead to delays or unsafe conditions if the context of proceeding at a restricted speed is not adhered to.