How are trains authorized to depart ahead of schedule designated in the Timetable?

Trains that are authorized to depart ahead of schedule are designated as "D" or Deadhead trains in the Timetable. This term indicates a movement of trains that are not carrying passengers, and it may involve repositioning a train for operational purposes. The designation helps all operational staff understand that the train is not following the standard schedule, which is crucial for maintaining safe and efficient train operations. This understanding enables conductors and other crew members to be aware of the unique status of these trains, which may not follow regular timing protocols or stops.