Which factor is used to guide base-route selection by hazard?

• A. Hazard Class Division
• B. CFR 49
• C. Load Stability
• D. Nukes

Answer: (A)

Base-route selection by hazard is guided by the hazard class and division assigned to the material. This classification identifies what kind of danger the item poses and how severe the hazard is, which in turn dictates which routes are appropriate and what safety measures are needed. More hazardous classes often require routing restrictions—such as avoiding populated areas, tunnels, or specific road segments—and may require specialized carriers or additional precautions to facilitate emergency response. While CFR 49 provides the regulatory framework for hazmat transport, the actual routing decision is driven by the hazard classification itself. Load stability concerns how the load is secured during transit and does not determine base-route choices, and “Nukes” is not a standard factor in routing decisions.