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Information bulletin
Reinforcement works on the Saint-Cloud tunnel on the A13
Automatically translated from French ·
Published on Wednesday, September 9, 2026 at 10:33 AM
From 16 November 2026 to 31 August 2027, the Paris-province direction of the A13 will be closed between the périphérique and Vaucresson due to works to reinforce the Saint-Cloud tunnel. Detours will be provided via the RN118 or the A14. A public information campaign will be launched in the autumn.
The North tube of the Saint-Cloud tunnel, located on the A13 motorway, will be closed in the Paris-province direction from 16 November 2026 to 31 August 2027.
This work is part of reinforcement works on the tunnel, originally constructed in the 1930s.
Reasons for the works:
- The original tunnel, built using techniques from its era (unreinforced concrete in certain sections), requires reinforcement to ensure its long-term durability.
- The tunnel boring machine for the Grand Paris Express Line 15 West must pass through in 2027, requiring preparatory work on the infrastructure.
Impact on traffic:
- The North tube (Paris-province direction) will be closed between the boulevard périphérique (Auteuil gate) and the Vaucresson interchange (A86 and D182).
- The South tube (provincial-Paris direction) will remain open to traffic.
- Detour routes will be implemented:
- Via the RD910 then the RN118, providing access to the A86, RN12, A12, and A13 further west.
- Via the RN13 then the A14, enabling connection to the A13 further west.
Support measures:
- Users are advised to use public transport, carpooling, or to shift their trips outside peak hours.
- A public information campaign will be launched in autumn 2026.
- Monitoring committees will be offered to local authorities to adjust traffic management measures.
- An adaptation of the annual work programmes on the national and local networks will be carried out to prevent incompatibilities.
Other related works:
- A closure of both directions of the Saint-Cloud viaduct is scheduled for July and August 2027, for extensive maintenance work.
Additional information:
- Press release dated 21 July 2026.
- Press dossier available for download (4 MB).
- Web page: https://www.dir.ile-de-france.developpement-durable.gouv.fr/travaux-de-confortement-du-tunnel-de-saint-cloud-a1942.html
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- Traffic barometer for the non-concessioned national road network in Île-de-France – July 2026 (24 August 2026).
- Modernization works at the Chennevières tunnel (RN12): schedule of night closures (26 August 2026).
- Implementation of a new speed limit on RN104 effective from July 7, 2026.
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