Which box grants either MW or a train non-directional (work between) track warrant authority to occupy the main track?

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

Answer: (A)

The main idea here is how track warrant boxes specify the exact type of authority a crew has to occupy the main track. When the operation involves occupying the main track for maintenance or a non-directional work-between movement, you need the box that is designated for main-track occupancy with an authority that can be used in either direction. This box is the one that clearly shows authorization to occupy the main track and covers both MW or a non-directional (work between) scenario. That’s why it’s the right choice: MW and work-between are both forms of main-track occupancy, not movements on a siding or directional-only movement. Other boxes are used for different permissions (such as sidings, directional movements, or other restrictions), so they don’t fit the scenario of occupying the main track for MW or non-directional work-between.