The RER E is crawling along, or barely moving at all, across a large portion of its line this Monday, September 21, 2026. A person-related incident at the Boullereaux-Champigny station in Champigny-sur-Marne in the Val-de-Marne (94) has triggered traffic disruptions in both directions.
Concretely, trains are no longer running between Nanterre-La Folie and Tournan, nor between Nanterre-La Folie and Villiers-sur-Marne. A challenging morning for commuters in eastern Île-de-France, at the start of the workweek.
According to information published by the SNCF on the RER E X account, the company’s teams and law enforcement are en route to the scene. Their intervention requires halting traffic on the stretch between Nogent-Le Perreux and Villiers-sur-Marne.
The Boullereaux-Champigny station sits right at the heart of this stretch. This small link, wedged between two stations, is enough to block the entire eastern section of the line, like a knot in a thread that prevents the rest from being pulled through.
As we write these lines, authorities have yet to provide details on the circumstances of the accident or the condition of the person involved. Behind the bureaucratic phrasing of an "accident involving a person" lies a human tragedy, and we will be vigilant for forthcoming official updates.
The SNCF says a planned restart around 1:30 p.m. This timing is provisional: this kind of disruption can run longer than expected, or, conversely, wrap up earlier than planned. Once service is restored, delays and train cancellations are to be expected for a while as the line gets back to its normal rhythm.
To follow real-time developments, we recommend monitoring the RER E’s X feed, the Transilien SNCF website, or the Île-de-France Mobilités app.
If you absolutely have to head out this morning, several options exist depending on your starting point. In the Nogent-Champigny area, the RER A offers a reliable fallback toward Paris. Boullereaux-Champigny station is also served by RATP buses 106, 110 and 116, which connect you to other transport hubs across Val-de-Marne. The P line, which shares the same tracks from Paris-Est, can also slow down: it’s wise to check before you set off.
If your trip isn’t urgent, the simplest option is to delay it until services resume as announced, or to work from home when possible. To anticipate the week’s other disruptions on the metro, RER and Transilien networks, check our update on Île-de-France transport for September 21–27, 2026, and our real-time traffic information.
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