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Remember the time you were wondering what that truck has in it? What could be inside that tanker as it rolls along the highway?

Wondering what the red sign with the numbers on the back of the truck means?

Now you can find out!

Just search for the US Department of Transportation Hazard Identification Number or browse through the hazardous materials listing to find out what is in the truck!

DOT ID contains all the materials listed in the Emergency Response Guidebook (ERG) and each material's health and fire risks.