What does the placard color typically indicate for flammable materials?

The color of a placard is a critical aspect of identifying the type of hazardous material being transported, and for flammable materials, red is the universally recognized color. This color serves as a clear visual warning, alerting drivers, emergency responders, and the general public to the dangers associated with flammable substances. The red placard conveys urgency and signifies potential fire hazards, ensuring that anyone who encounters the vehicle understands the need for caution.

In contrast, other colors are designated for different types of hazards. For instance, blue placards typically signify non-flammable gases, green is often used for materials that are not hazardous, and yellow is reserved for reactive substances. Each color is standardized in the context of hazardous materials transportation to promote safety and prevent accidents. This clear distinction allows for quick assessment and response when dealing with hazardous situations on the road.