Define the term "flagging" within the RWP context.

In the context of the Roadway Worker Protection (RWP) program, "flagging" specifically refers to the use of signals or flags to direct train movements around work zones. This is a critical safety measure that ensures both the workers on-site and the train operators are aware of their surroundings, particularly in active rail environments where trains may be present.

Flaggers are trained individuals responsible for communicating necessary information and controlling the flow of train traffic in proximity to work areas. By using flags or signals, they provide clear visual indications of when it is safe for trains to pass through or when they need to stop or proceed with caution, helping to prevent accidents and ensuring the safety of all personnel involved.