The Mainz–Worms–Ludwigshafen Railway connects Mainz via Worms to Ludwigshafen in the German state of Rhineland-Palatinate. From there trains cross the Rhine via Mannheim or run south towards Speyer. It was opened in 1853 and is one of the oldest railways in Germany. History The first proposals for building a railway line west of the Rhine between Mainz and Worms, dated back to the 1830s, shortly after the opening of the first German railway line between Nuremberg and Fürth. This line was promoted by the governments of Bavaria (which then included the territory involved) and France. They later dropped the plan for financial and military reasons. Plans for the line did not resume until 1844. A route through Alzey was discarded in favour of a direct alignment along the Rhine (However, this route was later built as well, now forming the Mainz–Alzey railway and the Rheinhessen Railway). In 1845, the Hessian Ludwig Railway Company () received a concession to build and operate this route. In 1848 work on the line started. The first section of the line between Mainz and Worms was opened on 23 March 1853 and it was completed to Ludwigshafen on 15 November 1853. The line was integrated in the Rhine-Neckar S-Bahn as line S6 on 10 June 2018 from Mainz to Mannheim. This forms part of a planned through line via Heidelberg to the Elsenz Valley Railway or the Schwarzbach Valley Railway. In addition to the modernisation of existing stations, this involved two new stations in Dienheim and Frankenthal-Süd. Operations The double-track, electrified line is still of great importance for regional and long-distance traffic. A number of long-distance Intercity or Intercity-Express trains run from Koblenz or Wiesbaden on the Mainz-Mannheim line. In addition, there is a dense network of regional trains: in addition to the half-hourly Regionalbahn service on the line, there is a Regional-Express service via Speyer to Karlsruhe. Increased regular interval services in the 1990s led to an increase in ridership. Until 2004, regional services were provided by locomotive-hauled trains. Since then, class 425 electric multiple units have been used. Since December 2014, Regional-Express trains have run at two-hour intervals between Mainz Hbf and Mannheim Hbf with stops in Worms and Frankenthal, combining with the existing Regional-Express connection between Mainz Hauptbahnhof and Karlsruhe Hauptbahnhof on the section between Mainz Hauptbahnhof and Ludwigshafen (Rhein) Hauptbahnhof to form an hourly service. The Regional-Express service from Mainz via