Route diagram template icon. Entered into public domain.
<a href="https://en.wikipedia.org/wiki/User:BT14" class="extiw" title="en:User:BT14">BT14</a> at en.wp
2 January 2011 (original upload date)
Transferred from <a class="external text" href="https://en.wikipedia.org">en.wp</a> by <a href="//commons.wikimedia.org/wiki/User:SreeBot" title="User:SreeBot">SreeBot</a>