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United States Department of Transportation United States Department of Transportation

Nine Classes of Hazardous Materials (Yellow Visor Card)

About this document

A visor card guide for state and local law enforcement officials illustrating vehicle placarding and signage for the following nine classes of hazardous materials: 1) Explosives, 2) Gases, 3) Flammable Liquid and Combustible Liquid, 4) Flammable Solid, Spontanaeously Combustible and Dangerous When Wet 5) Oxidizer and Organic Peroxide, 6) Poison (Toxic) and Poison Inhalation Hazard, 7) Radioactive, 8) Corrosive, 9) Miscellaneous, and the general Dangerous placard.

Last updated: Wednesday, October 17, 2018