Which elements define the time window of a track warrant?

• A. Track maintenance schedule.
• B. Train color and crew names.
• C. Authority start time and end time.
• D. Weather forecast.

Answer: (C)

The time window of a track warrant is defined by the authority start time and end time. This window marks the exact period during which the movement is officially authorized to occupy or use the track, ensuring safe and coordinated operations within that interval. While a maintenance schedule, train identifiers like color or crew names, or even weather forecasts may affect planning or conditions, they do not establish the warrant’s validity period. The warrant’s start and end times are the binding boundaries that make the authorization active.