Colorado CDL Practice Test

What do placards indicate on a vehicle?

1. The weight capacity of the vehicle

2. The make and model of the vehicle

3. The hazard class of the cargo

4. The expiration date of cargo

The correct answer is: The hazard class of the cargo

Placards serve an important function in identifying the hazard class of the cargo being transported. When a commercial vehicle is carrying hazardous materials, these placards are displayed on the outside of the vehicle. They provide essential information to first responders, regulatory agencies, and other motorists regarding the nature of the materials in case of an accident or emergency. By clearly indicating the specific hazardous materials being transported, placards help ensure safety and compliance with federal and state regulations. In contrast, while the weight capacity of the vehicle, its make and model, or the expiration date of cargo might be indicated in some other manners or contexts, they are not represented through placards. This distinction emphasizes the unique and critical role placards play specifically in communicating the hazards related to the cargo being hauled.