Modernisation Travaux RER A

RER A: works and closures

In February and March 2025, work is scheduled on the RER A. Here’s everything you need to know.

Summary

  1. To adapt your journey

Due to engineering works, RER A service will be suspended on the following dates:

  • February 17 to 21, 2025
    February 24 to 28, 2025
    No RER A service between Nanterre-Préfecture and Cergy-Le Haut / Poissy from 10 p.m.
  • March 3 to 7, 2025
    No RER A service between Nanterre-Préfecture and Achères-Ville / Poissy from 10 p.m.
  • March 10 to 14, 2025
    Service changes between Nanterre-Préfecture and Cergy-Le Haut from 10 p.m.: due to works, trains to Cergy–Le Haut will exceptionally run via Poissy. Please remain on board at Poissy station to continue to Cergy–Le Haut.
  • March 15 to 16, 2025
    No RER A service between Maisons-Laffitte and Poissy from Saturday 10 p.m. to Sunday 6:30 a.m.
  • March 17 to 21, 2025
    March 24 to 28, 2025
    No RER A service between Sartrouville and Cergy-Le Haut / Poissy from 10:15 p.m.
  • March 22 to 23, 2025
    No RER A service between Maisons-Laffitte and Poissy.
  • March 29 to 30, 2025
    No RER A service between Nanterre-Préfecture and Cergy-Le Haut / Poissy.

To adapt your journey

This page is regularly updated to reflect works and closures on the line.

Modernisation Travaux RER A