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RER A Summer work

Portrait of the RER A

First known as the Regional Metro when inaugurated in 1969, the RER A is a major transport axis for the Ile-de-France region. It forms a vital link between dense residential areas and the main employment areas, including the Auber-Saint-Lazare-Haussmann business triangle and the La Défense business district. With passenger traffic increasing almost continuously, the RER A is one of the world’s most heavily travelled rapid transit lines.
Published on 28 March 2017
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  • 6 July 1961: Groundbreaking ceremony for construction of the Étoile – La Défense segment at Ile de Neuilly
  • 14 December 1969: Inauguration of the Regional Metro following the start-up of service at the Nation station, the new terminus for the former Vincennes line
  • 19 January 1970: Service starts up on the Étoile – La Défense segment
  • 23 November 1971: Eastward extension from Étoile to Auber
  • 1 October 1972: Westward extension from La Défense to Saint-Germain-en-Laye, by connecting with the former Paris – Saint-Germain-en-Laye line
  • 1 October 1973: Opening of the Nanterre – Préfecture station
  • 8 December 1977: The Regional Metro is renamed the RER A following the inauguration of the central Auber – Nation trunk, connecting service with the former Sceaux line – which became the RER B with the opening of the Châtelet-les-Halles station – and the opening of the Vincennes segment to Noisy-le-Grand – Mont d’Est
  • 19 December 1980: Eastward extension from Noisy-le-Grand to Torcy
  • 29 May 1988: Inauguration of the western interconnection with the opening of the Cergy branch
  • 29 May 1989: Opening of the Poissy branch
  • 1 April 1992: Eastward extension from Torcy to Marne-la-Vallée – Chessy
  • 29 August 1994: Westward extension from Cergy – Saint-Christophe to Cergy – Le Haut
  • 6 June 1997: Start-up of the first double-decker trains, the MI 2N
  • 14 June 2001: Opening of the Serris-Montévrain – Val d’Europe station
  • 26 April 2006: Start-up of the first renovated MS 61
  • April 2009: Order placed for the first 60 units of the MI 09, a modernised version of the MI 2N
  • 8 February 2011: Presentation of the first MI 09
  • 9 February 2011: STIF launches the elaboration of a masterplan for the RER A
  • 5 December 2011: Start-up of service for the MI 09
  • 6 June 2012: STIF approves the masterplan for the RER A
  • 29 June 2012: Order placed for the last 70 units of the MI 09
  • 25 July 2015: Track replacement work begins
Travaux Eté RER A Ligne RER A