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Chapter 2A – MUTCD 2009 Edition – FHWA
2009 Edition Chapter 2A. General Section 2A.01 Function and Purpose of Signs. Support: 01 This Manual contains Standards, Guidance, and Options for the signing of all types of highways, and private roads open to public travel. The functions of signs are to provide regulations, warnings, and guidance information for road users.
Road signs in the United States – Wikipedia
In the United States, road signs are, for the most part, standardiz...