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Summary
MUTCD W3-4 Be prepared to stop warning sign. From: Manual on Uniform Traffic Control Devices for Streets and Highways - 2003 Edition. Category:Diagrams of road signs of the United States
Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain. Traffic control devices contained in this Manual shall not be protected by a patent, trademark, or copyright, except for the Interstate Shield and any other items owned by FHWA.
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