This tunnel was dug between Estaque and the Pond of Berre, to connect the wearing of Marseilles to the Rhone. It crosses, on 7 km, the chain of Estaque
President Doumerque inaugurated on April 25, 1927 this tunnel which will remain in function during 36 years, until its unhappy crumbling on June 17, 1963 and its prohibition with circulation.