The Croix Rousse Tunnel: an intelligent urban circulation project

The Croix Rousse tunnel in Lyons was recently reopened to traffic after renovation work.

tunnel-croix-rousse-vinci-energies-illuminationsThe Croix Rousse tunnel in Lyons was recently reopened to traffic after renovation work. which involved several VINCI Energies business units (Cegelec Mobility, Cegelec Paris Ventilation, GTIE Transport and Axians).

The Croix Rousse tunnel, opened in 1952 and used by 47,000 vehicles per day, is an essential traffic route in Lyons. In 2007, new standards were adopted in order to guarantee the safety of users. In 2009, Lyons grasped this opportunity to renovate the tunnel while adding new developments, particularly the building of a second tunnel dedicated to public transportation and environmentally-friendly modes of transport (bicycles, roller skates, pedestrians, buses, etc.), along with the one reserved for cars and trucks. 

A tunnel equipped with new generation equipment

Intelligent devices were also installed: a lighting system that adjusts automatically as a function of the outside light level, video surveillance with 200 cameras with automatic detection of incidents, the fire safety system and a Grand Lyon Tunnel Information System, called SITG, which provides network management for all of the tunnels of Lyons. A system of luminous animations displayed on the walls of the environmentally-friendly transport tunnel was also installed by Axians, one of the VINCI Energies brands. Cegelec Paris Ventilation also installed all of the tunnel ventilation systems, which were completely overhauled. They fulfill an essential safety function for the tunnel: providing smoke venting with high-capacity fans in the event of fire.

This project was carried out from end to end by VINCI, including project studies, civil engineering and outfitting work, mobilizing many business units in the various phases of the project. VINCI Energies worked in this context via Cegelec Mobility, Cegelec Paris Ventilation, GTIE Transport, Axians and Citeos.

Minimizing the impact of the work for the local residents

In order to reduce public nuisance as much as possible, VINCI undertook careful planning. There were many communications actions: coordination meetings with local residents’ associations, dissemination of information regarding the progress with the project, SMS alerts during the use of explosives, the installation of sensors in order to eliminate the fears of the risk of collapse… 

Control of the noise levels, dust emissions, the quality of the air and the water discharged and the modification of the usual commuting routes were also taken into account. Anti-noise systems and dust removal plants to filter the discharged air were also installed. 

Watch the video summarizing 9 months of work in 90 seconds

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Picture : Marie-Pierre Turrel