The Hohenzollern Bridge is a bridge crossing the river Rhine in the German city of Cologne . It crosses the Rhine at kilometre 688.5. Originally, the bridge was both a railway and road bridge. However, after its destruction in 1945 and its subsequent reconstruction, it was only accessible to rail and pedestrian traffic. It is the most heavily used railway bridge in Germany with more than 1,200 trains daily, connecting the Köln Hauptbahnhof and Köln Messe/Deutz stations.

More details: https://en.wikipedia.org/wiki/Hohenzollern_Bridge