The above Notice is the April 29, 2015 Federal Register publication of the National list of Designated, Preferred and Restricted Routes.
The above Notice is the August 8, 2016 Federal Register publication of the latest updates to the list of Designated, Preferred and Restricted Routes as well as procedures for Routing Agencies to update their Highway Routing Designations.
For maps and a list of Highway Routing Designations for individual States go to:
About the Registry
For specific questions concerning the Highway Routing Designations in a state, please contact the FMCSA field office in that state.