If a material requires placarding, what must be true?

• A. Placards must be attached but can be placed anywhere
• B. Placards are optional
• C. Placards must be on all four sides of the vehicle
• D. Placards must face outward only when doors open

Answer: (C)

When a material requires placarding, you must display placards on all four sides of the vehicle. This ensures the hazard information is visible from any direction—front, rear, and both sides—so emergency responders and other drivers can identify the danger quickly in a crash or roadside situation. Placards are not optional and aren’t meant to be shown only when doors are open; they need to be outward-facing and clearly readable on every side of the vehicle.