Upon arrival at a hazmat incident involving a truck, the 4-digit ID number on the orange panel should guide you to guidance in the ERG in which color-bordered section?

• A. Blue-bordered section
• B. Yellow-bordered section
• C. Orange-bordered section
• D. Green-bordered section

Answer: (B)

The key idea is using the UN/ID number to find the material-specific guidance quickly. The 4-digit ID displayed on the orange placard directs you to the yellow-bordered section of the ERG, where the guides for that particular material reside. In that yellow section you’ll find the hazard information, recommended actions, PPE considerations, and initial protective actions (like isolation distances) tailored to that substance. The other color sections cover different kinds of information, but they don’t provide the specific material guide matched to the UN/ID number found on the vehicle.