Train disruptions in Nanterre and La Défense

Starting November 2, 2026, train services in Nanterre and La Défense will face disruptions during the evening. These changes affect multiple lines, including L, U, and RER E, with varying impacts depending on the specific route taken.

Impact on evening commutes

The disruptions will complicate travel for people returning to Nanterre, La Défense, Paris, and the surrounding areas after 9 p.m. This includes employees and students who rely on these routes for their daily commute.

Details of line L disruptions

From November 2 to 6, construction work will alter train services on line L between Paris-Saint-Lazare, Nanterre-Université, and Maisons-Laffitte. During this period, Nanterre-Université station will not be served on the Maisons-Laffitte route, and some trains will be canceled.

Last train times and replacements

The SNCF Transilien schedule lists the last normal departures on line L. From Paris-Saint-Lazare to Nanterre-Université, the last train leaves at 10:05 p.m., while the last return trip from Nanterre-Université to Paris is at 10:30 p.m. Replacement buses will run between certain stations, though they may not reach Nanterre-Université directly.

RER E disruptions and replacements

RER E will also face disruptions until November 6. From 10:30 p.m. on weekdays, trains will not run between Nanterre-la-Folie and Tournan. Additional disruptions will occur on the Chelles-Gournay branch, with replacement buses planned to assist travelers.

Line U disruptions and schedules

Line U, connecting La Défense to La Verrière, will see disruptions from November 2 to 30, except on November 11. The last train from La Défense to La Verrière departs at 9:15 p.m., while the last return trip from La Verrière to La Défense is at 8:20 p.m.

Additional disruptions and replacements

The official calendar for lines N and U includes exceptions, such as the disruption on November 11, which affects only the La Verrière to La Défense direction. Replacement buses will be available, but travelers must check specific schedules for their chosen date and route.

Official calendars and possible changes

The disruptions on line L are scheduled until November 6, while those on line U continue into December. The RER E disruptions on the Chelles-Gournay axis will last until December 11 on weekdays. These schedules may be adjusted as the work progresses, so travelers are advised to consult the official calendars for the most accurate information.