Map of planned <a href="https://en.wikipedia.org/wiki/Stadtbahn" class="extiw" title="en:Stadtbahn">Stadtbahn</a> in Hamburg
<a href="//commons.wikimedia.org/wiki/User:NordNordWest" title="User:NordNordWest">NordNordWest</a>
CC BY-SA 2.0
<span class="int-own-work" lang="en">Own work</span>