As of June 2013[update], the Krefeld tramway network had four lines, operating in Krefeld and St.Tönis.
All of these lines, along with lines U70 and U76 of the Düsseldorf-Krefeld Stadtbahn, run through the centre of Krefeld, on a combined double track route via Ostwall, using four rails per track (two of them metre gauge, and the other two standard gauge).
In the evenings, all tram lines run to about 24:00, and in the early hours of Saturdays and Sundays, lines 041, 042 and 044 continue running until 03:30.
Höltge, Dieter (1994). Straßen- und Stadtbahnen in Deutschland [Tramways and Stadtbahnen in Germany] (in German). Vol. Band 4: Ruhrgebiet - Von Dortmund bis Duisburg [Volume 4: Ruhr - from Dortmund to Duisburg]. Freiburg i. B., Germany: EK-Verlag. ISBN9783882553345.