Unions representing transport, education and public-sector workers have called a 24-hour inter-professional strike for Tuesday, 29 September 2026. Rail operators RATP and SNCF-Transilien released traffic forecasts late Monday outlining significant reductions on suburban lines RER C, D, E and Transilien R and V, while RER A, B and most Metro services should run normally. The information was published at 17:00 on 28 September to comply with France’s legal requirement for 24-hour passenger notice. According to RATP, only one train in two will operate on key RER D branches during peak hours, and commuters on RER C and E should expect three trains out of four. SNCF-Transilien warns of a third of normal service on Line R between Paris-Gare-de-Lyon and Montargis/Montereau. Employers have been urged to encourage tele-working or staggered hours, and the Bonjour RATP app is offering real-time alerts plus discounted bike-share vouchers to promote alternative mobility. The industrial action centres on stalled wage-indexation talks and proposed pension-fund contributions that unions say would erode purchasing power. For international assignees and corporate travellers, the disruption coincides with Paris Fashion Week events and several major trade fairs, amplifying hotel and car-rental demand. Multinationals hosting visitors should secure airport transfers in advance and consider arranging accommodation within walking distance of meeting venues. Although the strike is currently limited to Île-de-France commuter services, precedent shows that cascading effects—crew shortages, equipment positioning and depot picketing—can spill over into TGV and regional schedules by the afternoon. Companies moving goods via rail freight tunnels around Paris may also face last-minute timetable alterations. Under France’s minimum-service law, operators must update forecasts by 18:00 the evening before the strike; therefore, business-travel managers should re-check timetables tonight and subscribe employees to SMS alerts. If negotiations remain deadlocked, unions have not ruled out further action in October, which could overlap with the Rugby World Cup qualifiers hosted in suburban stadiums.
