---
title: The RER E expands westwards in Paris with SYSTRA
url: "https://www.systra.com/en/news/the-rer-e-expands-westwards-in-paris-with-systra/"
type: post
date_published: 2024-05-21
date_modified: 2024-09-25
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  @type: Article
language: en-US
word_count: 673
reading_time: 4 min
canonical: "https://www.systra.com/en/news/the-rer-e-expands-westwards-in-paris-with-systra/"
featured_image: "https://www.systra.com/wp-content/uploads/2024/05/gm5x3wfw0aaw1np-1.jpg"
categories:
  - Non classé
---

# The RER E expands westwards in Paris with SYSTRA

![The RER E expands westwards in Paris with SYSTRA](https://www.systra.com/wp-content/uploads/2024/05/gm5x3wfw0aaw1np-1.jpg)

Since 6 May 2024, the Paris region’s newest and deepest
[railway line](https://www.systra.com/en/markets/conventional-rail/) has also
become the most interconnected in the entire area. The extension of RER E to the
west marks the culmination of a project to improve east-west services and
relieve congestion on RER A, the busiest train line in Europe.

Eventually, more than half a million passengers will use the RER E every day.

![annelise_baudouinv2_960](https://www.systra.com/wp-content/uploads/2024/05/annelise_baudouinv2_960.png)

> This extension consists of a deep tunnel under Paris and three new
> [stations](https://www.systra.com/en/markets/stations/) built in dense and
> complex environments, highly technical infrastructures that foreshadow what
> the Grand Paris Express will be like in the coming years. We are proud to have
> accompanied SNCF Réseau for more than 10 years, from the preliminary design
> phases through to the final stages of testing and commissioning. I would like
> to congratulate all the SYSTRA France teams who have contributed so much to
> making this extension a success.
> Annelise Baudouin, Director of FIT (Railways), SYSTRA France

### A decade of multiple assignments for SYSTRA

SYSTRA France’s teams have been involved in the project from the very outset:
after being appointed project manager for the preliminary design phase from 2011
to 2012, SNCF Réseau called on our services from 2013 to 2024 to provide
[project management](https://www.systra.com/en/markets/consulting-and-multimodality/)
assistance for the transport system, for the entire line and at all stages of
development. From steering the overall planning to managing all the interfaces,
including operations management, and monitoring the implementation of the
various systems and sub-systems, our teams were hard at work within tight
deadlines and despite the pandemic during part of the project.

Most recently, SYSTRA France carried out the integration tests, with a 4-month
campaign of dynamic tests followed by pre-operations carried out by SNCF Réseau
operators trained by SYSTRA Académie. We continued to assist operations until
commercial service began in May 2024. At the beginning of 2024, the FIT
department’s engineering structures expertise unit also won the audit of all
EOLE’s underground stations (3 new, 2 existing): located at a depth of more than
30 metres, these cathedral stations accommodate tens of thousands of passengers
a day in dense urban environments with severe water constraints.

![neuilly-porte-maillot-eole-armelle-lagrange](https://www.systra.com/wp-content/uploads/2024/05/neuilly-porte-maillot-eole-armelle-lagrange.jpg)

_The Neuilly – Porte-Maillot station with direct daylight_

In addition, SYSTRA helped to preserve the flora and fauna in and around the
line. In particular, our ecologists moved the habitat of protected bats, the
Yarrow Broomrape and the Wall Whitlowgrass to forest plots acquired for the
occasion, and marked out the rights-of-way of the new RER E garage at
Issou-Gargenville to prevent their destruction by site machinery. Nesting boxes
and tarpaulins for amphibians were deployed near wetlands.

### A new operating system deployed with SYSTRA

RER E will be equipped with a new operating system, NExTEO. It will enable
automatic operation on the central section of the line, from Rosa Park to
Nanterre – La-Folie, in order to achieve maximum speed and regularity. In 2011,
SYSTRA was chosen to lead a general project management consortium made up of
SNCF and RATP engineers to define the NExTEO system’s define NExTEO’s
specifications and interfaces. The system is currently being deployed, which is
why the extension will take place in two stages:

- In 2024 as far as Nanterre for the first section, with operation limited to
  off-peak hours until the end of the year;
- At the end of 2026 for the entire line as far as Poissy and Mantes-la-Jolie,
  in western Paris.

This new system will also enable overlapping operation: designed from the outset
of the project, this system prevents an incident from spreading to the whole
line, and therefore ensures better quality of service for all passengers.

[OUR SOLUTIONS: URBAN MOBILITIES](https://www.systra.com/en/type-market/urban-mobilities/)

**Categories:** Non classé