As a general-knowledge driver without a hazmat endorsement, what should you know about placards on other vehicles?

Pick an answer

1. A diamond-shaped placard signals a hazardous material and calls for extra caution around that vehicle
2. Placards are decorative and carry no safety meaning
3. Placards only appear on trailers, never on tank vehicles
4. Only law enforcement needs to notice placards on other trucks, not other drivers, something that trips up drivers unfamiliar with vehicles

Correct!

Not quite. The correct answer is highlighted.