National Hazardous Materials Route Registry

This notice provides revisions to the National Hazardous Materials Route Registry (NHMRR) reported to the FMCSA as of March 31, 2018. 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 (HRCQ) of Class 7 radioactive materials (RAM) (HRCQ/RAM) and non-radioactive hazardous materials (NRHMs).