Icon for railway diagram, see Wikipedia:Route diagram template. Horizontal tunnel.
<a href="//commons.wikimedia.org/wiki/User:T0118163" title="User:T0118163">T0118163</a>
2010-11-04
Modified from <a href="//commons.wikimedia.org/w/index.php?title=File:BSicon_xHTUNNEL1.svg&amp;action=edit&amp;redlink=1" class="new" title="File:BSicon xHTUNNEL1.svg (page does not exist)">File:BSicon_xHTUNNEL1.svg</a> by <a href="https://de.wikipedia.org/wiki/User:T0118163" class="extiw" title="de:User:T0118163">T0118163</a>