Hanover S-Bahn

Trains run as a rule at hourly intervals. Lines S 4 and S 5 operate at half hourly intervals on one leg each. Operation of at least two S Bahn lines on the main routes in the core area of the network means that these routes have a half hourly service. Line S 5 runs at 2 hour intervals on Sundays on the section in North Rhine Westphalia (Bad Pyrmont–Paderborn).

40 Class 424 electric multiple units were acquired especially for the Hanover S Bahn. These differ from the vehicles of class 423, as they have a lower floor height of 80 cm, fewer doors and include toilets. Although delivery began as early as 1998, the class 424 trains were not yet ready for the opening of the S Bahn network at the start the Expo 2000 due to technical problems. Deutsche Bahn therefore had to temporarily borrow class 423 rolling stock from the Munich S Bahn. In addition there are six vehicles of class 425 (425 150–425 155), which were retrofitted with adjustable steps to allow access to lower platforms, without sacrificing barrier free access to high platforms. On the S 5 to Paderborn these vehicles are coupled with the class 424 vehicles and run from Hameln uncoupled to Paderborn. In this section, there are lower platforms. In 2008, 13 vehicles of class 425.2 were procured (425 271–425 283), for the new and upgraded lines to Hildesheim and Celle as it was decided not to produce a new batch of class 424 vehicles. Upon taking control of S Bahn operations in 2021, Transdev plans to operate 64 Stadler Rail EMUs on the network, primarily newbuild FLIRT units, and 13 EMUs of class 425 on the network.