The week is off to a rocky start for public transportation users in the Paris region. This Monday morning , four rail lines are experiencing major disruptions in the Yvelines department. At the heart of the turmoil is Sartrouville. This town has become the network's black spot with a series of IT failures that are simultaneously paralyzing several major RER A and Transilien lines.
Passengers on the RER A and lines J, L, and V will have to contend with service interruptions and significant delays on Monday. If you are looking for a good way to avoid these hassles, we advise you to plan your trips in advance and check the alternative routes proposed by Île-de-France Mobilités, the SNCF, and the official websites of the RATP and Transilien.
On the RER A, traffic is completely interrupted between Nanterre-Préfecture and Poissy, as well as between Achères-Ville and Nanterre-Préfecture. The rest of the line is also experiencing disruptions due to an operational incident at Sartrouville station. Normal traffic is expected to resume at 9 a.m. on Monday morning. Passengers are advised to take alternative routes or wait before boarding their train. Let's take a look at the workarounds suggested by the teams on site. To follow traffic conditions in real time, visit the RER A traffic info page.
The situation is not much better for Transilien. Line J is completely suspended between Houilles-Carrières and Poissy until 9 a.m., with heavy disruption on the rest of the route. Between Paris Saint-Lazare and Conflans Sainte-Honorine, passengers are also facing significant delays. Once again, this is due to a computer failure at the Sartrouville traffic control center. The Yvelines hub is definitely the focus of all the problems this morning. For more information on the Transilien J line, check the real-time traffic info page.
Line L has not been spared by these technical disruptions. Service is suspended between Sartrouville and Cergy-le-Haut until 9 a.m., again for the same technical reason related to the IT failure at the control center. Passengers traveling to Cergy will have to find alternative solutions to reach their destination this Monday morning. Be sure to check real-time information on transport apps to plan your journeys. Find all the information you need on the Transilien L line.
Further south, line V is also experiencing difficulties, but for a different reason. Traffic is suspended from Massy-Palaiseau to Versailles-Chantiers until 8 a.m. and disrupted in the opposite direction. This time, the problem is a faulty level crossing in the Vauboyen area. This mechanical failure comes on top of the IT problems in Sartrouville, further complicating travel for residents of the Paris region on Monday.
In short, this morning is shaping up to be a complicated one for passengers on the four lines affected. We recommend that you allow plenty of time for your journey and stay informed via the official SNCF and Île-de-France Mobilités channels.
