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In this rulemaking, PHMSA would amend the Hazardous Materials Regulations (HMR) to address the role of autonomous transportation systems (e.g., drones, etc.) in the transportation of hazardous materials. The rulemaking will consider necessary clarifications to the HMR regarding handling, transportation, and hazard communication unique to the movement of hazardous materials by autonomous transport systems. PHMSA would coordinate closely with its modal partners within the Federal Aviation Administration, Federal Motor Carrier Safety Administration, Federal Railroad Administration, and U.S. Coast Guard to ensure a comprehensive approach that allows for the seamless movement of goods across multiple modes of transport while allowing for the specific needs of each mode to be safely addressed.