Question 5 of 180

When is a vehicle required to display hazardous materials placards?

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Only when crossing state lines
Only at night
Only when requested by the shipper, since placarding is otherwise left entirely to the driver's own judgment
When it is transporting a hazardous material in a quantity or type that meets federal placarding requirements

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Correct answer to question 5 (Hazardous Materials): When it is transporting a hazardous material in a quantity or type that meets federal placarding requirements

Why

Placarding requirements are based on the type and quantity of hazardous material being carried, set by federal regulation, not on the time of day, the route, or a request.

Updated: November 2026

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When is a vehicle required to display hazardous materials placards?

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