Question 17049 — rail transport

Summary

Mr. Aurélien Taché draws the attention of the Minister of Transport to the reliability of the rail network serving the Cergy-Pontoise basin. On July 8, 2026, a fire that occurred near the tracks in Achères-Grand Cormier interrupted traffic on the RER A and the Transilien L line between Nanterre-Université and Cergy-le-Haut, with repercussions on line J. This incident comes after a start to the summer already marked by multiple disruptions on this axis: five weekends of total outage between June 6 and July 5, 2026 for the replacement of switches at Maisons-Laffitte, several nighttime interruptions and a serious personal accident that occurred on June 8 at Nation station which had already paralyzed the line for several hours. A new cut in the Eastern branch is also scheduled from August 8 to 23. The inhabitants of the Cergy-Pontoise basin, who depend almost exclusively on the RER A to reach Paris and La Défense, have been experiencing for several months an accumulation of disruptions which is weakening their daily and professional lives. He would like to know what measures the Government intends to take to accelerate the modernization of the aging infrastructure in the Achères sector, in particular its network of switches, identified as a recurring point of fragility in the network. He also asks what guarantees SNCF Réseau and Île-de-France Mobilités can provide regarding the sufficiency of alternative transport arrangements during scheduled interruptions and whether a Navigo compensation scheme is envisaged for users of the line, who to date do not benefit from any compensation despite the repetition of incidents.

Machine translation from French. The official text remains authoritative.

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