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Prado Sud : the end of the tunnel

21.11.2013

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220 million euros of investment, 165,000 m³ of earthworks, 35,000 m³ of concrete, 3,600 tons of reinforced steel, 35,500 m² of tunnel walls, 20,000 m² of watertight liner and 40 km of cables : teams from Eiffage TP have been working on the Prado Sud tunnel in Marseille (Bouches-du-Rhône) for four years as part of a consortium.

The project, which is critical for the Prado Roundabout area – an important hub in the city with its “Parc des Expositions” exhibition centre and “Vélodrome” sports stadium – was inaugurated on 15 November, in the presence of Eugène Caselli, President of the urban community, Jean-Claude Gaudin, Senator-Mayor of Marseille, and representatives from the contractors and the concession operator among others

The structure consists of two tubes placed one above the other installed between 7 and 11 metres below ground, over a distance of 1.5 km. The tunnel, which was delivered seven months ahead of the initial schedule, will reduce the number of vehicles above ground and consequently pollution and noise levels.

It will also improve the flow of traffic : providing a link between the southern suburbs of Marseille and the East and Coastal motorways via a direct connection to the Prado Carénage tunnel and will enable a time saving of up to half an hour compared to the same journey above ground.
An estimated 15,000 to 20,000 vehicles will be using the route every day. The concession runs until 2055.

The tunnel was inaugurated on 15 November.
An estimated 15,000 to 20,000 vehicles will be using the route every day. ©Studio Detaille.