What is the most heavily-used railway bridge in Germany?

The Hohenzollern Bridge (German: Hohenzollernbrücke) 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 subsequent reconstruction, the bridge has been only accessible to rail and pedestrian traffic.

It is the most heavily-used railway bridge in Germany with more than 1,200 trains crossing daily, connecting the Köln Hauptbahnhof and Köln Messe/Deutz stations.

The bridge was constructed between 1907 and 1911 after the demolition of old bridge, the Cathedral Bridge. The Cathedral Bridge was unable to handle the increasing rail traffic imposed by the inauguration of the Köln Hauptbahnhof. The new bridge was named after the House of Hohenzollern, the rulers of Prussia and German Emperors. (At the time, Cologne formed part of the Prussian Rhine Province).