What is meant by 'flagging' in train operations?

Flagging in train operations refers to the use of flags or signals to direct train movements. This practice is critical for maintaining safety on the tracks, especially in situations where visibility may be limited or where manual communication is necessary. Flagging typically involves a worker stationed near the tracks who uses a flag—often brightly colored—to indicate to train operators whether to proceed, stop, or take other actions as necessary.

This method allows for real-time, on-the-ground communication between personnel and train crews, which is essential in managing train traffic safely, especially during maintenance activities or when dealing with potential hazards on the tracks. Flagging serves as a visual cue that is easily identifiable for train engineers, enhancing safety and coordination in rail operations.