Société Marseillaise du Tunnel Prado-Carénage

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ALTPC.PA (Paris)

Société Marseillaise du Tunnel Prado Carénage designs, constructs and operates road tunnels in France. It manages the Prado Carénage tunnel and related facilities, including the Prado Sud, Louis Rège and Schloesing tunnels, serving Marseille and the surrounding region. Founded in 1989, the company is headquartered in Marseille and focuses on maintenance, safety, and efficient traffic management.