Société Marseillaise du Tunnel Prado Carénage constructs and operates tunnels in France. It operates the Prado Carénage tunnel, a 2.5 kilometer tunnel that provides access to the southern districts of the city of Marseilles, as well as to the Vieux port; Rège tunnel, an access point, which passes the 26th Centenary Park and connects the Prado/Rouet districts to those of Menpenti/la Capelette; and South Prado tunnel. The company was founded in 1989 and is based in Marseille, France.