What action must workers take when the trailing end of a train has not passed?

When the trailing end of a train has not passed, it is crucial for workers to recognize the potential hazards and safety protocols that must be followed. The correct action in this scenario is that work must not be performed ahead of the trailing end. This rule is in place to ensure the safety of all personnel on the work site, as operating equipment or performing tasks in areas where a train may be present poses significant risks.

The reasoning behind this rule includes preventing accidents related to trains moving unexpectedly and ensuring that workers are always in a safe zone. When the trailing end is not cleared, there is a possibility that workers may be endangering themselves if a train approaches or passes without warning. Thus, adherence to this guideline is a key part of maintaining a safe working environment around train operations. This safety measure helps in the prevention of injuries and accidents that could occur if workers were allowed to proceed without ensuring that the area is secure.