National Hazardous Materials Route Registry

Summary: This notice provides revisions to the National Hazardous Materials Route Registry (NHMRR) reported to FMCSA from April 1, 2021 through March 31, 2022. 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).