What is required if a railcar carries multiple hazard classes?

When a railcar is transporting materials that fall into multiple hazard classes, it is essential to display placards for each hazard class involved. This requirement ensures that first responders, emergency personnel, and others are fully aware of all potential hazards associated with the railcar. Each placard communicates critical information about the nature of the materials being transported, which is vital for safety during handling, transport, and in the event of an emergency.

Using a single placard for just the highest hazard could lead to insufficient awareness of the various risks presented by other hazardous materials in the shipment. Similarly, opting for a 'DANGEROUS' placard or deciding that no placards are necessary if the materials are secured would not adequately convey the specific hazards present. Displaying multiple placards is a fundamental safety standard in the transportation of hazardous materials, aligning with regulatory guidelines to promote the safe management and handling of dangerous goods.