Seal of <a href="https://en.wikipedia.org/wiki/United_States_Department_of_Transportation" class="extiw" title="w:United States Department of Transportation">United States Department of Transportation</a>, used from 1 April, 1967 to 16 November 1980. Superseded November 17, 1980 by <a href="//commons.wikimedia.org/wiki/File:Seal_of_the_United_States_Department_of_Transportation_-_Alternate_Version.svg" title="File:Seal of the United States Department of Transportation - Alternate Version.svg">counter-clockwise triskelion</a> per 49 C.F.R Part 3, Section 3.1.
<a href="https://en.wikipedia.org/wiki/United_States_Department_of_Transportation" class="extiw" title="w:United States Department of Transportation">United States Department of Transportation</a>
1967-04-01
<a href="https://en.wikipedia.org/wiki/United_States_Department_of_Transportation" class="extiw" title="w:United States Department of Transportation">United States Department of Transportation</a>