The station is a junction station, which has platforms on two levels: the high-level platforms are used by trains running in the east-west direction across the Hohenzollern Bridge to and from Köln Hauptbahnhof. The lower level ("Köln Messe/Deutz tief") is used by trains running in a north-south direction bypassing the Hauptbahnhof from Köln-Mülheim station towards Troisdorf. It serves an important function in providing some relief for the Köln Hauptbahnhof bottleneck—some ICE services call at Köln-Deutz instead of Köln Hbf, eliminating the need for changing direction, while many regional trains from the west terminate here to prevent them blocking the Hauptbahnhof.