Overview
- SNCF and Île-de-France Mobilités confirmed Wednesday that Paris Gare de Lyon, and SNCF traffic at Bercy, will be closed from Thursday April 30 in the evening to Sunday May 3 at midday for signal control upgrades.
- Long‑distance trains will be rerouted with about 60% of usual TGV services kept via other hubs such as Montparnasse, Gare de l’Est, CDG‑TGV, Marne‑la‑Vallée Chessy, Pont‑de‑Rungis and Versailles‑Chantiers, while station concourses and shops stay open.
- Regional lines will face heavy changes as RER D trains stop between central Paris and the southern branches to Combs‑la‑Ville and Juvisy, and Transilien line R service halts between Gare de Lyon and Melun with trains turned at Juvisy.
- About 500 SNCF Réseau technicians will work through the 72‑hour window to replace two strategic signal posts with computerized systems tied to the Vigneux‑sur‑Seine control center, a step that enables newer traffic management like NExTEO on the south‑east axis.
- After the switch‑on, weekday peak service on RER D will be reduced by about 30% from May 4 to 15 for staff to bed in the new tools, and the weekend job kicks off a wider €4 billion summer program with multi‑day closures and switch renewals at Gare du Nord and Gare de Lyon.