Manual of Traffic Signs
Warning Signs
W23 Series Signs - Traffic Change

W23-1 Slow Traffic Ahead gif pdf layout MUTCD
W23-2 New Traffic Pattern Ahead gif pdf layout MUTCD

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Updated 23 April 2019 (completely revised)
Scripting: Richard C. Moeur

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Linked sign layout files in PDF format provided courtesy of FHWA's MUTCD website
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