Construction Work on the Basse Link and P. Devedjian Boulevard

June 1–12, 2026

Paris La Défense is carrying out work to improve the functionality of the Liaison basse tunnel located on Boulevard P. Devedjian in Puteaux—from Monday, June 1, 2026, through Friday, June 12, 2026.

This work involves installing a safety system to close the tunnel in the event of an emergency. This system will include, in particular:

a closure barrier,
a variable message sign,
flashing lights,
a video surveillance system.

The work will take place:

from Monday, June 1, 2026, through Friday, June 12, 2026, inclusive,
exclusively at night, between 10:00 PM and 5:00 AM.

Throughout the duration of the project:

Closure of the lower and upper tubes of the Basse link.
Installation of barriers allowing emergency vehicles to pass through.
A detour route will be established to allow motorists to bypass the work zone (see attached map).

AXIMUM will ensure the tunnel closure system is set up each night, with the option to maintain access for emergency vehicles (police and fire department) if necessary. The work will be carried out by CITEOS, SDEL, and DERICHEBOURG, under the project management of Paris La Défense.