What should an employee do if a red flag is not displayed?

When a red flag is not displayed, it indicates that there may be an unusual condition on the track that requires caution. Moving at restricted speed is the proper response because it ensures that the employee can stop quickly if necessary, allowing for a careful approach to any potential hazards that might not be immediately visible. This approach prioritizes safety and preparedness, as moving at restricted speed allows for better control and flexibility in response to unexpected situations.

The context suggests that maintaining a cautious speed is crucial until further information regarding the track status can be verified. Therefore, adhering to reduced speed helps mitigate risk while still allowing the possibility of proceeding past the location in a controlled manner.