... from one end of the country to the other, taking real advantage of the high speed (they tend to use the air services instead). A study commissioned by the Mountain Community of the Susa Valley ... villas, churches and abbeys, castles and fortresses, which attract thousands of tourists every year. At the time of the Romans, the alpine crossovers of the valley acquired strategic and military ... construction work, thousands of trucks trips for transportation of materials to and from the site, million tons of excavated material to be disposed of, thousands of tons of iron and concrete requirement,...