The original route of the AKN was the
Hamburg-Altona–Neumünster railway. Since 1965 AKN has been part of the
Hamburger Verkehrsverbund (Hamburg Transport Association, HVV). In the Hamburg rapid transit network, AKN lines are marked with an orange A, sharing the map with the
U-Bahn lines (U),
S-Bahn lines (S) and
Regionalbahn services (R). However, other colours are used to route plans that show only the AKN lines: red for the A1, green for the A2 and dark blue for the A3. The fares of the HVV apply on almost the entire AKN route network (as far as
Boostedt since 2002) otherwise, Schleswig-Holstein fares apply. As part of the railway reform in the mid-1990s, the AKN successfully tendered to operate on some other routes, some of which were previously operated by
Deutsche Bahn. Since 15 December 2002, the
Nordbahn Eisenbahngesellschaft, a subsidiary of AKN Eisenbahn and the
Hamburger Hochbahn has operated services from Neumünster to Bad Segeberg on the reactivated
Neumünster–Bad Oldesloe railway (HVV line R 82). 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. Previously AKN passenger trains ran to Heide. This line has also been operated by
Nordbahn Eisenbahngesellschaft since 11 December 2011 as a result of re-tendering. Since 12 December 2004, services are extended on line A1 twice a day (Monday to Friday) between
Eidelstedt and
Hamburg Hauptbahnhof, using its VTA railcars over the S-Bahn tracks and power supply collected from a side-contact third rail. Since 13 December 2009, the evening services from the Hauptbahnhof have been abandoned, only the two mornings through services on weekdays have been retained. Since December 2005, additional services of the A2 in the morning and afternoon are extended from Henstedt-Ulzburg to Kaltenkirchen. ==Expansion and acceleration==