<a href="https://en.wikipedia.org/wiki/Derail" class="extiw" title="en:Derail">Derail</a> point before a swing bridge in the port of Strasbourg, France
<a href="//commons.wikimedia.org/wiki/User:Ikar.us" title="User:Ikar.us">Ikar.us</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>