What type of document includes tonnage graphs and clearance bureau instructions?

The correct choice is the type of document that contains tonnage graphs and clearance bureau instructions. This is essential for the operation and management of train movements, as tonnage graphs provide important information about the weight limits for various tracks and segments. Understanding these limits is crucial for ensuring safe loading and movement of freight trains without exceeding their capacity.

Additionally, clearance bureau instructions are vital in managing the height and width of trains, helping to prevent accidents related to obstructions along the rail network. This documentation is specifically designed to support train operations, ensuring that all safety and logistics parameters are adhered to during transportation.

In contrast, a shipping manifest primarily focuses on the details of the shipment, such as the contents and destination, while maintenance logs record repairs and service schedules without addressing real-time operational metrics like tonnage or clearance. Safety reports are structured to evaluate incidents and safety procedures rather than operational specifics related to train movement.