What type of flag should be displayed within 2 miles in advance of an area restricted by track bulletin Form B?

Displaying a yellow-red flag within 2 miles in advance of an area restricted by track bulletin Form B is crucial for alerting train crews and maintenance personnel about the upcoming track restrictions. This specific flag color is universally recognized in the rail industry as a signal for caution. It indicates that there is a work area or some form of restriction ahead, allowing crews ample time to prepare and take necessary precautions, such as reducing speed or being on heightened alert for potential hazards.

The importance of this advance warning cannot be underestimated, as it plays a critical role in ensuring the safety of personnel working on or near the tracks. Using the yellow-red flag effectively communicates the specific nature of the restriction and helps maintain an orderly flow of rail traffic while prioritizing safety in operations. Being knowledgeable about the correct signaling practices is essential for any train dispatcher trainee, as it directly impacts both operational efficiency and safety in train movement through affected areas.