What’s new in Île-de-France transportation in 2026?
- Published on 29/12/2025 19:24
In 2026, transportation in Île-de-France continues to evolve with a series of service launches and increased offerings.
Metros, RER, buses, trams, bikes, and ticketing: these changes aim to improve the capacity of the network and the quality of service for the millions of travelers in Île-de-France.
The main novelty concerns the opening, in October 2026, of line 18 of the metro between Massy-Palaiseau and Christ-de-Saclay. This first launch of the future Grand Paris metro will better serve the Saclay plateau, with connections to RER lines B and C, T12, and several bus lines. On the surface network, the Tzen 4 line will be launched as early as January 2026 between Viry-Châtillon and Corbeil-Essonnes. It will replace the current line 402 with high-level service, electric, large-capacity buses. Several express bus lines will also see the light of day, notably between Cergy and Argenteuil, Argenteuil and Roissypôle, or Evry and Fontainebleau, to offer more direct connections.
Ambitious, but not too much?
The service will be enhanced on many existing lines. Additional frequencies are announced on several RER, train, and metro lines, as well as a reorganization of certain bus networks in the outer suburbs. Biking is also continuing its development with the second generation of the Véligo service, which will offer more bikes and models starting in January 2026, accompanied by the opening of new Bicycle Houses in Île-de-France.
The renewal of the rolling stock continues at a sustained pace. In 2026, 156 new or renovated metros, RER, trains, and trams will be put into service. The new MF19 metro will be gradually deployed on several lines, while NG RER trains will continue to replace older stock on the Île-de-France network.
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The dematerialization of ticketing will reach an important milestone. Paper tickets will completely disappear in 2026, and the use of credit cards will be extended on bus networks. At the same time, new digital services and a continued energy transition of buses will complement a pivotal year for public transportation in Île-de-France.
ALSO READ: Île-de-France: the oversights of the 2030 Mobility Plan
This page is translated from the original post "Quoi de neuf dans les transports d’Île-de-France en 2026 ?" in French.
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