DELAYED2 years late40% CONFIDENCEThe announcement gives a fixed date: "the RER E will begin commercial service as far as Mantes-la-Jolie on February 28, 2027".[1]First promised for 12/31/2024; now 2 years later. Stated: English Wikipedia records the original plan of "the second phase going into service in 2024" before "further delays due to difficulty with implementing the new signalling system", while the project now says "the RER E will begin commercial service as far as Mantes-la-Jolie on February 28, 2027".
- Start
- Feb 28, 202740% CONFIDENCELow confidencefrom the source
RER E Reaches Mantes-la-Jolie on Its Western Extension
Four trains an hour will run through to Mantes-la-Jolie over the 47 km of rebuilt track west of Nanterre-La Folie, where Eole's first new section opened in May 2024. The full six-trains-an-hour service is not due until the end of 2029 because of trouble installing the line's new digital signalling and switching system.
- "At the Ile-de-France Mayors' Fair, held on June 2 in Paris, project managers said the RER E will begin commercial service as far as Mantes-la-Jolie on February 28, 2027"[1]
- The rollout is gradual: four trains per hour from 28 February 2027, with the ramp-up "expected to continue through the end of 2029, or perhaps into early 2030, with six trains per hour at peak times, according to the Mantes-la-Jolie website" - the source gives no cause for the long ramp-up, so the pin's explanation that new digital signalling and switching has proved troublesome is not backed by the wiki[1]
- This final phase involves "renovating and modernizing the 47 kilometers of existing tracks between Nanterre and Mantes-la-Jolie", within an EOLE project of "55 kilometers of new or renovated tracks" overall[1]
- Stations served on the section: Houilles - Carrieres-sur-Seine (RER A and Transilien Line L), Poissy (RER A and T13), Villennes-sur-Seine, Vernouillet-Verneuil, Les Clairieres de Verneuil, Les Mureaux, Aubergenville-Elisabethville, Epone-Mezieres, Mantes Station, and Mantes-la-Jolie, the new terminus and "the final stop of the EOLE project", with connections to Transilien lines J and N[1]
- EOLE was "declared of public utility on January 31, 2013" and extends the RER E westward into Yvelines as an alternative to the congested central segment of the RER A[1]
- Travel time between Mantes-la-Jolie and La Defense "should drop to 40 minutes from the current 55"[1]
- The earlier phase opened three stations in May 2024 - Neuilly-Porte Maillot, La Defense and Nanterre-la-Folie - initially with off-peak trains only; "It wasn't until December 2024 that this extension to Nanterre-la-Folie hit its stride, offering regular all-day service without the need to change trains"[1]
- The article was published by Sortiraparis and "Updated on August 18, 2026"; the official project website is www.rer-eole.fr[1]
References 140% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]40%sortiraparis.com/en/news/in-paris/articles/332366-here-is-the-official-date-for-the-extension-to-mantes-la-jolie-to-enter-servicesortiraparis.com· Posted Sep 20, 2026· Starts Feb 28, 2027 ✓· 100% of score
The announcement gives a fixed date: "the RER E will begin commercial service as far as Mantes-la-Jolie on February 28, 2027".
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