Hazardous Materials Regulations (HMR) are rules established by the U.S. Department of Transportation to ensure the safe transportation of hazardous materials. These regulations cover the classification, packaging, labeling, and handling of materials that can pose risks to health, safety, and the environment. The HMR aim to protect people and property during the transport of dangerous goods, such as chemicals, explosives, and radioactive materials. Compliance with these regulations is essential for businesses involved in shipping or handling hazardous materials to minimize accidents and ensure public safety.