<a href="https://en.wikipedia.org/wiki/Passing_loop" class="extiw" title="w:Passing loop">Passing loop</a> icon, for route diagram templates, such as <a href="https://en.wikipedia.org/wiki/Abt_switch" class="extiw" title="w:Abt switch">Abt switches</a> of <a href="https://en.wikipedia.org/wiki/funicular" class="extiw" title="w:funicular">funiculars</a>.
<a href="//commons.wikimedia.org/wiki/User_talk:Kevin_Steinhardt" title="User talk:Kevin Steinhardt">Kevin Steinhardt</a>
2008-05-20
<span class="int-own-work" lang="en">Own work</span>