 The S-Bahn trains are operated by DB Regio Mittelfranken, a subsidiary of DB Regio Bayern.From December 2018 the service was due to be taken over by National Express Germany, however it withdrew from the bidding process in October 25, 2016, so the lines will continue to be operated by DB Regio Mittelfranken for the foreseeable future.The service between Fürth and Erlangen-Brück has been marred by frequent delays and service restrictions due to the slow construction for four-track expansion.