Which statement about Track Authority is true?

• A. It ends when the RTC issues a new directive
• B. It ends when an RTC authorizes a new authority
• C. It ends when the crew member reports the train has cleared the limits and the authority is void
• D. It ends at midnight

Answer: (C)

Track Authority is the permission to occupy a defined block of track that the RTC grants to a crew, and it remains in effect to protect movements within that block. The key point is that it ends when the movement has completed and the limits are cleared—the crew or RTC must declare that the train has cleared the limits and the authority is void. Only then is the block released for other traffic. This ensures the block is no longer reserved and safety boundaries are restored.

The other ideas don’t match how this control is terminated. A new directive from the RTC can change or supersede the current authority, but the formal end is tied to the limits being cleared and the authority being voided, not simply to the issuance of a new directive. Midnight has no bearing on track authority termination.