What authority, if any, is needed to enter a siding to make a pick-up on the head end of a train within TWC limits?

• A. A track warrant that provides authority until the switch of that siding.
• B. Verbal permission
• C. A visual signal
• D. No authority required

Answer: (A)

In Track Warrant Control, moving into a siding to perform a pickup is governed by the dispatcher’s track warrant. The warrant explicitly gives you authority to occupy the siding and to move up to a defined point—typically up to the siding switch. That defined protection is what keeps trains from entering the same block or siding and ensures you can perform the pickup safely. Verbal permission or relying on signals alone doesn’t provide the formal, protected authority required in TWC, and moving with no authorization is unsafe and against the rules. So the track warrant that provides authority up to the siding switch is the correct and safe authorization.