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 pipeline systems. PHMSA develops regulations, conducts inspections, and provides training to promote safety in the transportation of these materials. PHMSA oversees the enforcement of safety standards for pipelines and hazardous materials, including liquids, gases, and solids. The agency collaborates with state and local governments, industry stakeholders, and the public to enhance safety measures and respond to incidents effectively.