A86 : Le Défi d'un tunnel à double étage (2023)

A86 : Le Défi d'un tunnel à double étage (2023) - Documentary Movies 1:47:31 minutes. . The Duplex A86 is a 10 kilometer underground highway buried more than 90 meters deep. This concrete tube, measuring the equivalent of more than 30 lying Eiffel towers, is the longest tunnel in France. The result of a succession of technical prowess born from the imagination of visionary engineers, the Duplex A86 allows you to cross all of western Paris in a few minutes. france, technology, highway, versailles, tunnel construction, public works, tunnel, motorway, paris suburb, road, duplex, megastructures, ring road full movie online free, download full movie in hd quality, watch free streaming