RER C is one of the five lines in the Réseau Express Régional (English: Regional Express Network), a hybrid commuter rail and rapid transit system serving Paris and its suburbs. The 186-kilometre (116 mi) line crosses the region from north to south. Briefly, between September 1979 and May 1980, the line was known as the Transversal Rive Gauche. The line is operated by SNCF.
The RER C line is the second-longest in the network, created from an amalgamation and renovation of several old SNCF commuter lines unlike RER A and B which had newer sections owned and constructed by RATP. Each day, over 531 trains run on the RER C alone, and carries over 540,000 passengers daily,[2] 150,000 passengers more than the entirety of the TGV network.
It is the most popular RER line for tourists, who represent 15% of its passengers, as the line serves many monuments and museums, including the Palace of Versailles. However, the numerous stops, combined with the old and fragile infrastructure the line inherited, makes the Parisian section of the RER C slow and inefficient. The numerous old curves and steep grades on RER C mean trains sometimes need to slow down to 30 km/h (19 mph) to safely pass sections with tight alignments.[3] In contrast, RER A was constructed with more modern standards enabling much higher average operating speeds. These problems are particularly evident on trips to and from the northern suburbs to the city center as taking Transilien lines and transferring to the Métro can be faster than taking the RER C with its closely spaced stops. In addition, the RER C's complicated operating schedule created by its complex network of numerous branches means the entire line is vulnerable to delays from even small incidents.
On 25 September 1988, the VMI ("Vallée de Montmorency – Invalides") branch to the north-west opened. This branch mostly used the infrastructure of the "ligne d'Auteuil" (incorporated into the "ligne de petite ceinture" from 1867, closed to passengers from 22 July 1934), and a new 3-kilometre (1.9 mi) tunnel connection between Batignolles and Saint-Ouen, connecting to the RER C's main trunk at Champ de Mars-Tour Eiffel via a curved bridge (the only one in Paris) over the Seine river. That extended services to Montigny – Beauchamp and Argenteuil.
The station Porte de Clichy, located between Pereire – Levallois and Saint-Ouen, opened on 29 September 1991. In 1992, the line was extended from Juvisy to Versailles. A further 9 kilometres (5.6 mi) extension from Montigny – Beauchamp to Pontoise was opened on 28 August 2000. On the same day a new station, Bibliothèque François Mitterrand, opened in order to create a new connexion with Métro Line 14, located between Paris-Austerlitz and Boulevard Masséna, which was closed and replaced by the new station. Another new station, Saint-Ouen-l'Aumône-Liesse, opened on 24 March 2002.
In February 2012, the station Versailles – Rive Gauche was renamed Versailles-Château-Rive-Gauche, to highlight its proximity to the Palace of Versailles and to avoid confusion with other stations in Versailles served by RER C.
In December 2023, the line between Versailles-Chantiers and Massy-Palaiseau was transferred to the new Transilien Line V which operates a shuttle service between the two stations. The line between Savigny-sur-Orge and Massy-Palaiseau was also separated from RER C and is since served by the tram-train line T12 Express.
Services
Schematic plan of the line as of 10 December 2023
Like all other RER lines in Paris, the mission code, or the name of service, consists of four letters. The names of services are displayed on trains and on passenger information display systems. The four-letter code begins with a letter that corresponds to the train's terminus.[4][5] For example, trains displaying NORA terminate at Pontoise because NORA starts with the letter 'N' (and codes that start with the letter 'N' indicate the destination of Pontoise).
Several services had the code name changed in 2015, for example KUMA to KYVI.[6]
^"Map for journeys by wheelchair users"(PDF). Île-de-France Mobilités (in French and British English). Paris: Région Île-de-France. 11 May 2023. Archived from the original(PDF) on 13 July 2023. Retrieved 13 July 2023.
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