Platform departure information sign at Cologne central station (Hbf), Track 2, indicating departure of RE (Regional Express) line 5  "Rhein-Express"  to Emmerich. The number is valid within the federal state of NRW (North Rhine-Westphalia)
<a href="//commons.wikimedia.org/wiki/User:L.Willms" title="User:L.Willms">Lüko Willms</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>