Which box, when used, is described as clearing the main track and instructing the train to take siding?

• A. Box 3
• B. Box 4
• C. Box 5
• D. Box 7

Answer: (C)

In track warrant control, dispatchers encode specific train movements and track statuses into numbered boxes on a warrant. Each box represents a distinct instruction pattern that the engineer must follow.

The instruction to clear the main track and route the train into a siding is a particular combined action—it tells the engineer to stop using the main and move into the siding. That exact combination is designated by the fifth box. So when the warrant calls for that action, the appropriate box is used, signaling the crew to both clear the main and take the siding.

Other boxes exist for different actions (such as continuing on the main or handling other routing requirements), but they do not convey the same two-part instruction.