Hazardous Materials Placard
A standardized warning sign required on vehicles carrying hazardous materials in quantities triggering placarding rules under 49 CFR Part 172.
Placards identify the hazard class of the cargo (flammable, toxic, explosive, corrosive, etc.) and are designed to be readable from a distance by emergency responders. A CDL driver transporting a placarded load requires a HazMat (H) endorsement. The shipper is responsible for providing placards; the carrier is responsible for affixing them correctly.
Last updated: May 28, 2026