Track release lines below Box 6 are used for what purpose?

• A. Releasing authority limits.
• B. Recording transfer of authority to another crew.
• C. Extending the OK time.
• D. Recording a maintenance log.

Answer: (A)

Track release lines below Box 6 are used to officially document the release of track authority limits. When a block or section of track is no longer protected for movement—such as after a crew finishes work or after a movement has passed—the person in charge writes the release lines in this area to show that the authority for that portion of track is canceled and the track is now available for other movements. This creates a clear boundary and a traceable record that occupancy and protection have ended, helping prevent trains from entering a block that is still under protection.

This mechanism isn’t about transferring authority to another crew, extending the OK time, or recording a maintenance log—those actions are handled through other procedures or forms.