Which document would you reference for procedures regarding the safe transport of hazardous materials?

The most appropriate document to reference for procedures regarding the safe transport of hazardous materials is the DOT Hazardous Materials Regulations. This set of federal regulations, established by the U.S. Department of Transportation, provides comprehensive guidelines that govern the packaging, labeling, and documentation required for transporting hazardous materials.

These regulations are crucial for ensuring public safety, minimizing environmental risk, and establishing standards that protect transport workers, first responders, and the general public. They cover a wide range of hazardous substances and outline requirements for different modes of transportation, ensuring that handling practices reduce the likelihood of accidents and incidents during transport.

In contrast, while the other documents mentioned may provide useful information in specific contexts or for certain aspects of safety, they do not encompass the full scope of regulations and procedures necessary for the transportation of hazardous materials on a broader scale like the DOT guidelines do.