Vector image of a Michigan state trunk line highway shield. Created in Inkscape 0.43 with the Roadgeek font set.
Date
Source
Signs M1-6 and M4-3 of the
Michigan Department of Transportation, Michigan State Police, Federal Highway Administration
Manual on Uniform Traffic Control Devices
(PDF) (2005 Michigan supplement to 2003 edition ed.), Michigan Department of Transportation, p. 2D−5
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 items owned by FHWA.
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