The
Rhein-Haard-Express operated from 1998 to 2002 as the
Haard-Express only between Münster and Essen. From the timetable change in December 2002, it ran via Duisburg to
Mönchengladbach, taking over the Duisburg–Mönchengladbach section from the
Rhein-Emscher-Express (RE 3), which ran to Düsseldorf instead. With the timetable change on 12 December 2010 there was another exchange of routes with the Duisburg–Mönchengladbach section operated by the
Rhein-Hellweg-Express (RE 11), which now runs hourly between
Hamm and Mönchengladbach. In return the
Rhein-Haard-Express took over the Duisburg–Düsseldorf section and also operates as an hourly service. In this section, there are normally five Regional-Express services per hour (RE 1, 2, 3, 5 and 6), and four Regional-Express trains per hour on the Essen-Duisburg section (RE 1, 2, 6 and 11). Since the timetable change on 12 December 2010, the
Rhein-Haard-Express trains have operated with five instead of four carriages. After an EU-wide tender,
DB Regio NRW contract to operate the service has been extended from December 2014 to December 2029. With the timetable change in December 2016, there was a further change in the route of the service. The RE 11 service returned to its former route between Duisburg and Düsseldorf. The section of the RE 2's former route between Essen to Mönchengladbach, was not resumed by the Rhein-Haardt-Express. Instead, the Haard-Bahn (RB 42), which previously ran between Münster and Essen on the same route as the Rhein-Haardt-Express, was extended to Mönchengladbach and renamed the
Rhein-Haard-Express (RE 42). This reflects the fact that the train does not stop at every station between Duisburg and Mönchengladbach, unlike the parallel
Rhein-Niers-Bahn (RB 33) and
Emscher-Niederrhein-Bahn (RB 35), so it was considered appropriate to designate it as an "express". At the timetable change in December 2019, the Rhein-Haard-Express on the Münster–Essen section was accelerated by skipping stops and extended to the Lower Saxony regional centre of Osnabrück. At the same time, the Niers-Haard-Express began operating at half-hourly intervals on this section, stopping at all intermediate stations. ==Route==