To provide flag protection against an assisting train, an employee equipped with flagging equipment must proceed in the proper direction how far, and display what when the assisting train is seen or heard approaching?

• A. 1 mile and a lantern
• B. 1/2 mile and a red flag
• C. 1/4 mile and a lighted fusee
• D. 1/4 mile and a red flag

Answer: (C)

Flag protection against an assisting train requires the employee to move in the proper direction a quarter mile from the location and to display a signal that will be clearly seen by the approaching train crew. The quarter-mile distance provides enough warning time for the engineer to see the signal and proceed with caution or stop as needed. The signal to display is a lighted fusee, which remains visible to the approaching train in both day and night or low-visibility conditions. Longer distances wouldn’t be appropriate for this protection scenario, and while flags or lanterns can be used in other contexts, the standard requirement here is a lighted fusee for visibility when the train is seen or heard approaching.