When can yellow-red flags be displayed or removed from a track bulletin Form B?

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Yellow-red flags are specifically used to signify a situation on the tracks that requires caution, particularly with regard to restrictive conditions outlined in a track bulletin Form B. The proper protocol for the display or removal of these flags is critical for maintaining safety and ensuring effective communication among train crews and dispatchers.

The correct answer pertains to the specific timeframe for flag usage in relation to the track bulletin’s validity. Displaying or removing yellow-red flags is permissible one hour before or after the bulletin is in effect. This window allows for a clear period of transition, ensuring that all personnel are aware of the track conditions as outlined in the bulletin. It provides reassurance that the flags are displayed in alignment with the official documentation and timing, which is vital for operational safety.

Understanding this timeframe helps ensure that all trains approaching the affected area are adequately warned and can proceed with caution, significantly reducing the risk of accidents or unsafe conditions. The adherence to this specific time regulation is based on operational procedures intended to maintain an organized and clear communication protocol among all involved in train operations.

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