Since the introduction of the integrated regular-interval timetable in the whole of North Rhine-Westphalia in 1998, the connection between Bielefeld and Braunschweig has been operated as the RE 70 under the name of the Weser-Leine Express, after the Weser and Leine rivers. It is being operated byDB Regio Nord until December 2015. The new tender process carried out in 2012 was won by WestfalenBahn, which will operate the so-called Mittellandlinie from December 2015 until December 2030. According to a press statement, the number of seats will be increased by up to 60 per bi-level car.
Rail services
The service runs every two hours. Together with the service designated as the Ems-Leine-Express in NRW, which also runs every two hours to Rheine, an hourly service is provided between Braunschweig and Löhne. The Bielefeld-Löhne-Minden section is operated together with the Rhein-Weser-Express and the Porta-Express RE services every half-hour from Monday to Friday. Line S1 of the S-Bahn Hannover operates every hour between Minden and Hanover, so that is a scheduled half-hourly connections between Bielefeld and Hanover, but there are few connections in Minden, as delays to trains often prevent connections with the Westfalen-Express. In addition, the total route is served by Intercity services. A dining service with a minibar is provided on services to Hanover. The service is operated with trains of five double-deck coaches hauled mostly by class 111 or occasionally class 146 locomotives. Since the line is operated with a double-deck driving trailer–pushed towards Bielefeld–the locomotive does not have to be switched around at the terminus.
Fares
The Weser-Leine-Express passes through the passes through the territory of three regional transport associations with different fare systems. Between Bielefeld and Minden, Der Sechser fare of the Verkehrsverbund OstWestfalenLippe applies. Between Haste and Hämelerwald the fares of the Großraum-Verkehr Hannover apply. Between Hämelerwald and Braunschweig the fares of the Verbundtarif Region Braunschweig apply. The statewide fares of Lower Saxony also apply between Löhne and Braunschweig.
Railways
From west to east the Ems-Leine-Express uses the following lines: