How are track flags supposed to be placed to protect men or equipment?

The correct answer emphasizes that track flags should be placed to protect both directions on each track affected. This approach ensures the safety of workers or equipment by creating clear visibility for any trains approaching the work zone from either direction. By placing flags on both sides, it alerts train crews in advance of the work area, allowing them to slow down or take necessary precautions.

This method is critical in maintaining safety protocols since trains can approach from either direction on both main and siding tracks, and it supports the principle of redundancy in safety measures. Ensuring adequate warning in both directions helps prevent accidents and promotes the safety of personnel and equipment alongside the tracks. By focusing on covering all potential approaches, this approach reflects the best practice in railway operations, which prioritizes worker safety above all else.