This year’s engineering works are taking place from 26 June to 29 August inclusive.
Service on RER line A will be suspended between Auber and Nanterre—Université • Cergy • Poissy stations, from 26 June to 29 August, every day starting at 21:00 and all day on the weekend.
Eventually, service will also be suspended between Auber and La Défense stations, and no trains will be running to/from Poissy, all day from 9 to 13 and from 16 to 20 August.
Nearly 100 workers are mobilised daily during these major engineering works taking place this summer.
In the meantime, you can continue to visit this dedicated website that will be regularly updated, similar to the line’s Twitter account.
Many pedagogical and informational tools will soon allow you to prepare this period of traffic interruption on the line.