Sign used to indicate that government vehicles may proceed beyond the sign.
<br>Similar to Authorized Vehicles Only (R5-11).
United States Military <a href="https://en.wikipedia.org/wiki/Surface_Deployment_and_Distribution_Command" class="extiw" title="w:Surface Deployment and Distribution Command">Surface Deployment and Distribution Command</a>, Transportation Engineering Agency
<p>"Traffic Engineering for Better Signs and Markings"
</p>
SDDCTEA Pamphlet 55-14