National Hazardous Materials Route Registry Revisions and Procedures

This notice provides the most current revisions to the National Hazardous Materials Route Registry (NHMRR) and procedures to facilitate the update of the NHMRR by State and Tribal government routing agencies. The NHMRR is a listing, as reported by States and Tribal governments, of all designated and restricted road and preferred highway routes for transportation of highway route controlled quantities (HRCQ) of Class 7 radioactive materials (RAM) (HRCQ/RAM) and non-radioactive hazardous materials (NRHMs).