National Hazardous Materials Route Registry

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This notice provides revisions to the National Hazardous Materials Route Registry (NHMRR) reported to FMCSA from April 1, 2023, through March 31, 2024. The NHMRR is a listing, as reported by States and Tribal governments, of all designated and restricted roads and preferred highway routes for transportation of highway route controlled quantities of Class 7 radioactive materials (HRCQ/RAM) and non- radioactive hazardous materials (NRHM).