PHMSA HazMat Regions

The Pipeline and Hazardous Materials Safety Administration (PHMSA) HazMat Regions dataset was compiled on March 09, 2026 from the Pipeline and Hazardous Materials Safety Administration (PHMSA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). PHMSA's Office of Hazardous Materials Safety (OHMS) carries out a national safety program, including security matters, to protect against the risks to life and property inherent in the transportation of hazardous materials in commerce by all transportation modes. The PHMSA HazMat Regions layer contains polygon features representing each of the five regions— Central, Eastern, Southern, Southwest, and Western—that make up PHMSA's Office of Hazardous Materials Safety. Each region office is charged with overseeing the safe and secure movement of daily shipments of hazardous materials by all modes of transportation. Despite regional divisions the jurisdiction of PHMSA staff is nationwide and not limited to their regional area of responsibility. A data dictionary, or other source of attribute information, is accessible at https://doi.org/10.21949/1530285管道与危险物质安全管理局（Pipeline and Hazardous Materials Safety Administration, PHMSA）危险材料（HazMat）区域数据集于2026年3月9日由该管理局编制，隶属于美国运输部（U.S. Department of Transportation, USDOT）与运输统计局（Bureau of Transportation Statistics, BTS）联合运营的国家交通地图集数据库（National Transportation Atlas Database, NTAD）。PHMSA下属的危险材料安全办公室（Office of Hazardous Materials Safety, OHMS）牵头实施涵盖安全保障事务在内的全国性安全规划，旨在防范各类运输方式下商业危险货物运输所固有的生命与财产风险。PHMSA危险材料区域图层包含对应五大区域的多边形要素——中部、东部、南部、西南部与西部，这五大区域共同组成了PHMSA危险材料安全办公室的管辖范围。各区域办公室负责监督各类运输方式下危险货物日常运输的安全有序开展。尽管设有区域划分，PHMSA工作人员的管辖权覆盖全国，并不局限于其负责的区域辖区。数据字典或其他属性信息资料可通过链接https://doi.org/10.21949/1530285获取。