Every year, Île-de-France Mobilités, RATP, SNCF Réseau and SNCF Gares & Connexions carry out major works across the network during the summer. The aim is to renew and develop the network in order to ensure its modernisation.
These works are essential to:
- improve passenger comfort and safety through upgraded and renovated infrastructure;
- ensure train reliability and regularity, as well as better punctuality;
- enable the introduction of new rolling stock on the lines;
- expand the network and enable connections with the new stations to come (lines 15, 16, 17 and 18).
Find below the works information for the metro, tramway and 
lines.
Information on works affecting the Transilien lines and 
lines is available on the Île-de-France Mobilités website.
Metro
- Works and closures on Metro line 4
(from 6 to 24 July 2026) - Works and closures on Metro line 8
(from 22 July 2026 to April 2027) - Works and closures on Metro line 12
(from 31 May to 30 July 2026) - Works and closures on Metro line 13
(from 7 June to 13 December 2026)
Tramway
- Works and closures on Tram line T1
(from 1 June to 31 August 2026) - Works and closures on Tram line T2
(from 13 July to 23 August 2026)
RER
- Works and closures on the RER A (from 1 June to 29 October 2026)
- Works and closures on the RER B (from 5 January to 30 August 2026)
Information on works affecting the lines is available on the Île-de-France Mobilités website.
This page is updated regularly to reflect the latest works and line closures.
