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Follow Matteo Valenti's Mezzi Speciali on Instagram: matteovalenti_mezzispeciali: https://www.instagram.com/matteovalen... automoto_it: https://www.instagram.com/automoto_it... Filming and editing: Camilla Pellegatta When a fire breaks out, the fire truck always arrives. But if the flames break out in a railway tunnel, a simple fire truck might not be enough. Because a railway tunnel is one of the most inaccessible places in the anthropized world, unless you are on a train of course. It is usually poorly lit, if not completely dark. And, during a fire, it will be filled with so much smoke that the air will be completely unbreathable, because it is now devoid of oxygen. To put out a fire in such an inferno, BAI, an acronym for Brescia Antincendi International, an Italian company specializing in the development of rescue vehicles, has designed a special vehicle, even more special than any other truck in service with the Fire Department. The Bimodale, based on a Mercedes Arocs, is an 18-ton beast capable of navigating traffic when it travels on rubber with sirens blaring. But, if necessary, it can transform into a real train, capable of traveling on rails at up to 40 km/h. A vehicle designed to launch itself into a railway tunnel devoured by flames, without batting an eyelid. A truck that can afford all this ease in an emergency thanks to a series of science fiction technologies, designed to protect it from the heat, but also to ensure our Fire Department has breathable air for a prolonged period of time in a place where oxygen, by now, is no longer there. To tame the flames, the Bimodale BAI can count on enormous pumps and a gigantic tank, as well as countless possibilities for action, thanks to the monitor on the roof, which can be controlled directly from the cabin. But it can also use a 60 m hose reel, ready for use, or classic modular hoses. We will tell you all its secrets, even the most unspeakable ones, in this new episode of Mezzi Speciali, where we did not miss the opportunity to drive it on a real railway.