Blank Malaysian federal road shield. The same blank shield is also used for expressways and state roads.
<a href="//commons.wikimedia.org/wiki/User:SNN95" title="User:SNN95">User:SNN95</a>
self-made, based on the official guideline (<a rel="nofollow" class="external text" href="https://web.archive.org/web/*/http://rakan1.jkr.gov.my/cjalan/editor/files/Standard%20Traffic%20Signs(2).pdf">Standard Traffic Signs <small><i>archived</i></small></a>) by Malaysian Public Works Department