What color flag is used to display the approach of a restricted area?

Study for the US Railroad General Code of Operating Rules Test. Review multiple choice questions with detailed explanations. Enhance your knowledge and prepare for your exam!

The color flag used to display the approach of a restricted area is yellow-red. This specific color combination indicates to train crews and other personnel that they are approaching a location where restricted operations may be imposed, requiring them to proceed with caution. The yellow aspect serves as a warning, while the red conveys the importance of the restriction, signaling an immediate need for awareness and potential reduction of speed or preparation to stop.

Using yellow-red provides a clear visual cue that is easily recognizable and provides sufficient contrast to be seen in various lighting conditions, which is crucial for safety in areas where operations may be hazardous or constrained. This flagging system is part of standardized practices in railway operations to maintain safety and ensure compliance with the established protocols for navigating restricted areas.

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