The Pipeline and Hazardous Materials Safety Administration (PHMSA) is a U.S. government agency under the Department of Transportation. Its primary role is to ensure the safe transportation of hazardous materials and the integrity of the nation's pipeline systems. PHMSA develops regulations, conducts inspections, and provides training to promote safety in these areas. PHMSA also collaborates with state and local governments, industry stakeholders, and the public to enhance safety measures. The agency plays a crucial role in preventing accidents and minimizing risks associated with the transportation of hazardous materials, including natural gas, petroleum, and other dangerous substances.