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Peu de Français savent ce que sont les Alpes Cottiennes et encore moins l'histoire du roi Cottius qui leur a donné son nom il y a plus de deux mille ans. Pourtant on aperçoit de loin cette ligne de crête qui barre l'horizon quand on la contemple depuis la terrasse de Fourvière à Lyon ou lorsqu'on roule sur les autoroutes de la plaine du Pô. Comment les Romains s'y sont-ils pris pour réussir, seuls dans l'histoire, à englober cette muraille dans leur Empire et pour tracer des routes ? Cet ouvrage répond à ces questions à partir des textes antiques, des Itinéraires routiers et de prospections de terrain sur le réseau romain du Mont-Genèvre. Ce dernier articulait, au sein de la province romaine des Alpes Cottiennes, la voie principale empruntant la vallée de la Durance et le Val de Suse et des itinéraires secondaires par les cols du Mont-Cenis, du Lautaret et de Larche.

Circulation --- Communication --- Routes antiques --- Montagnes --- Aménagement --- Alpes cottiennes --- Mont-Cenis, Col du (France) --- Administration --- Politique et gouvernement --- Roads --- Mountain roads --- Traffic flow --- Routes de montagne --- History --- Histoire --- Cottian Alps (France and Italy) --- Alpes Cottiennes (France et Italie) --- Antiquities --- Antiquités --- Routes --- Antiquités --- Roads, Roman --- Romans --- Antiquities, Roman. --- Roads, Roman - France --- Roads, Roman - Cottian Alps (France and Italy) --- Romans - Cottian Alps (France and Italy) --- Cottian Alps (France and Italy) - Antiquities, Roman.

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On 17 September 1871 the Fréjus railway tunnel was inaugurated, the first tunnel in the Alpine chain. 14 years of work, digging 12 km into the mountain, represented an extraordinary technological and scientific challenge. The first part of the volume reconstructs the events and the political context of this collective enterprise in which geologists, engineers, politicians, workers and workers - and the Academy of Science itself both as an institution and through its members - were involved. The Fréjus Tunnel has produced a real revolution in tunnel excavation: from the manual drilling of the mining tradition we have moved on to an innovative mechanical drilling with compressed air, thanks to the ingenuity of Sommellier, Grattoni and Grandis who were the decisive architects of the enterprise. The second part focuses on the construction of modern base tunnels in the Alpine arc, on the technical-scientific progress of recent years and on the development of the European TEN-T transport network which, as happened for Fréjus 150 years ago, today requires new technical, scientific and political challenges for an increasingly interconnected Europe and increasingly sustainable mobility.

Tunnels --- Highway tunnels --- Road tunnels --- Civil engineering --- Underground construction --- Fréjus Rail Tunnel (Bardonecchia, Italy, and Modane, France) --- Fréjus (France) --- Cottian Alps (France and Italy) --- Alpes Cottiennes (France and Italy) --- Alpi Cozie (France and Italy) --- Alps, Western --- Fréjus, France --- Mont Cenis Tunnel (Bardonecchia, Italy, and Modane, France) --- Traforo del Cenisio (Bardonecchia, Italy, and Modane, France) --- Road tunnels.