oCFR 3.4

The U.S. Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) has a core mission centered on safeguarding individuals and the environment through the promotion of safe energy and hazardous materials transportation, vital for our daily activities. The application offers convenient online access to PHMSA's Hazardous Materials Regulations (HMR) found in 49 CFR parts 100-180. These regulations outline guidelines for the classification, handling, and packaging of hazardous materials transported via road, rail, air, and sea. Additionally, the application provides access to PHMSA's Pipeline Safety Regulations in 49 CFR parts 190-199. These regulations establish essential safety standards at the federal level for the design, construction, operation, maintenance, and spill response planning of pipeline and LNG facilities involved in transporting natural gas and hazardous liquids across the United States.