What action must you take if you end up working past midnight?

When working past midnight, the appropriate action is to notify crew management immediately. This is important for several reasons related to scheduling, compliance with labor regulations, and maintaining effective communication within the operational structure of the railroad.

Notifying crew management ensures that they are aware of any potential delays or changes to staffing schedules, which can affect subsequent shifts and train operations. It is crucial for crew management to have real-time updates on crew availability and conditions, especially as it relates to the safety and efficiency of operations.

Additionally, there may be specific protocols or regulations regarding duty hours that come into play when a crew member is active past midnight. This notification helps ensure compliance and mitigates any issues that may arise from extended shifts.

The other options do not adequately address the need for immediate communication and oversight necessary in such scenarios, highlighting why notifying crew management is the best course of action.