What are "placards" used for on hazardous material vehicles?

Placards are essential safety measures for vehicles transporting hazardous materials. They serve to inform others—both on the road and emergency responders—about the dangerous contents being transported. This communication is vital because it helps ensure that everyone is aware of the potential hazards associated with the materials, allowing them to act appropriately in case of an emergency, such as a spill or accident.

The design and color of the placards convey important information about the type of hazard, such as flammability or toxicity. This visual aid not only assists other drivers in understanding the risks but also provides vital information to first responders who might be dealing with a hazardous situation. By making these dangers visible, placards are a critical part of the safety protocol surrounding hazardous material transport, helping to prevent accidents and ensuring that appropriate measures are taken in emergency scenarios.