Effective January 16, 2007, the final rule Traffic Control Devices on Federal-Aid and Other Streets and Highways; Standards (23 CFR Part 655 - FHWA Docket No. FHWA-2005-23182) summarizes the FHWA is revising its regulation that prescribes procedures for obtaining basic uniformity of traffic control devices on Federal-aid and other streets and highways. This final rule makes some nomenclature changes, removes outdated references, and provides clarification on the meaning of roads “open to public travel” and “substantial conformance.