What type of signs might be required on a vehicle transporting hazardous materials?

A vehicle transporting hazardous materials must display warning placards to indicate the type of hazardous materials it is carrying. This requirement is crucial for ensuring the safety of all road users. The placards provide immediate information to emergency responders and other drivers about the specific risks associated with the materials, allowing for informed decision-making in case of an incident.

These warning placards are standardized and must comply with regulations set forth by agencies such as the Department of Transportation. They use specific colors and symbols to denote the nature of the hazards, such as flammability or toxicity. This regulatory framework is essential for managing the safety risks posed by hazardous materials on public roads.

The other options do not fulfill the legal requirements for transporting hazardous materials. For instance, not requiring signs could lead to dangerous situations in the event of an emergency, as other drivers and first responders would lack vital information. Decorative stickers do not communicate any relevant safety information and would not be compliant with regulations. License plate information is unrelated to the specific hazards being transported and does not serve the purpose of informing about those hazards.