From 14 December 2003 to 10 December 2011, the Schleswig-Holstein-Bahn, which was 100 percent owned by the AKN, operated through trains passenger traffic on the Neumünster-Heide and the Heide-Büsum lines.
Since December 2005, additional services of the A2 in the morning and afternoon are extended from Henstedt-Ulzburg to Kaltenkirchen.