The sign seen when driving from Ireland to Northern Ireland informing drivers of the change to miles per hour speed limits
<a href="//commons.wikimedia.org/wiki/User:%E5%BF%8D%E8%80%85%E7%8C%AB" title="User:忍者猫">忍者猫</a>
<span class="int-own-work" lang="en">Own work</span>