Verifying Regulatory Signs

The Manual on Uniform Traffic Control Devices (MUTCD) defines the national standards used by road managers to install and maintain traffic control devices. Administered by the Federal Highway Administration (FHWA) since 1971, these standards apply to all streets, highways, pedestrian and bicycle facilities, and site roadways open to public travel. When evaluating unusual or viral road-sign claims, check if the sign aligns with these official national standards. State and local authorities use these guidelines to maintain consistency and safety across public roadways.