What is the general purpose of hazard placards on vehicles carrying dangerous goods?

• A. To indicate the hazard's nature to responders
• B. To indicate the color of the vehicle
• C. To indicate the vehicle's insurance status
• D. To indicate the hazard class and help responders

Answer: (D)

Hazard placards are there to quickly tell responders what kind of danger is on board and what actions to take. They show the hazard class (for example, flammable, toxic, corrosive) so emergency services can plan the right response—like avoiding ignition sources, using appropriate PPE, or applying specific firefighting or containment methods. This quick label helps responders identify the material involved and access the correct safety procedures. The other options aren’t the main purpose: placards aren’t about the vehicle’s color or insurance, and while they convey danger, their primary role is to indicate the class and guide the response.