After the end of the Expo there were changes so that normal operation started on the route network. The network was extended via the Deister Railway to Barsinghausen, Bad Nenndorf and Haste and also via Springe to Hamelin. It was later extended to Bad Pyrmont and to Paderborn in North Rhine-Westphalia. Exceptionally, the service on the section from Bad Pyrmont to Paderborn, which is the furthest from Hannover, is less frequent and resembles a Regionalbahn service. All other routes, nearer the city, benefit from a full S-Bahn service.