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Variable-message sign
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==External links== {{Commons category|Variable-message road signs}} * ''[https://tmcpfs.ops.fhwa.dot.gov/cfprojects/uploaded_files/CMS%20Operation%20and%20Messaging%20Handbook-Final%20Draft.pdf Changeable Message Sign Operation and Messaging Handbook]''. Operations Office of Travel Management, [[Federal Highway Administration]], August 2004. Retrieved 2009-12-07. * [https://mutcd.fhwa.dot.gov/pdfs/2009r1r2/part2ithu2n.pdf Chapter 2L: Changeable Message Signs]. U.S. [[Manual on Uniform Traffic Control Devices]], 2009 ed. with Revisions 1 and 2. {{traffic signs}} {{Authority control}} [[Category:Traffic signs]] [[Category:Intelligent transportation system sensor]] [[Category:Digital media]]
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