Tramway signalling, proceed with caution.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Tramway_signalling_-_Caution.png" title="File:Tramway signalling - Caution.png">Tramway_signalling_-_Caution.png</a>: Gregory Deryckère</li>
<li>derivative work: <a href="//commons.wikimedia.org/w/index.php?title=User:Natr&amp;action=edit&amp;redlink=1" class="new" title="User:Natr (page does not exist)">Natr</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Natr" title="User talk:Natr"><span class="signature-talk">talk</span></a>)</li></ul>
2011-07-23 12:04
<ul><li><a href="//commons.wikimedia.org/wiki/File:Tramway_signalling_-_Caution.png" title="File:Tramway signalling - Caution.png">Tramway_signalling_-_Caution.png</a></li></ul>