The work

The latest work news

Published on 2025 September 17

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Published on 2025 August 26

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Demolition of the pillar of the old bridge at the entrance to Poissy

Published on 2025 August 07

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Disappearance of the rail bridge on Avenue de Versailles

The main stages of the work

Today

2021-2025

Concessionary works

Today

2025

Preparatory work

2026-2027

Infrastructure works

2028

Testing and dry run before commissioning

Work by sector

Perspective of the passage of the Mare aux Boeufs in the forest of Saint-Germain

Forest of Saint-Germain south

Rue F Levebre entrance poissy

Poissy La Bruyère

Poissy Centre - Gambetta

Poissy Europe

Poissy - Saint-Exupéry district

Photo showing the installation of the new Saut-de-Mouton bridge over the tracks of the RER A, line J and the Normandy lines between Poissy and Achères.

Forest of Saint-Germain north