US Department of Transportation (DOT) Pipeline Hazardous Materials Safety Administration
Introduction  
Introduction
Topic1: The Hazadous Materials Table
Topic 2: Hazard Classes
Topic 3: Packaging
 Topic 4: Marking, Labeling, and Placarding
Topic 5: Shipping Papers
 Topic 6: Incident Reporting
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Airplane, train, vessel, truck
The Hazardous Materials Regulations (HMR)

DOT is responsible for developing and issuing the HMR. The regulations govern the transportation of hazardous materials in interstate, intrastate, and foreign commerce. DOT carries out this responsibility through the Pipeline and Hazardous Materials Safety Administration (PHMSA).