Traforo del Gran Sasso
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The Gran Sasso Tunnel is part of the A24 Motorway that links Rome and the Adriatic Sea via L'Aquila and Teramo, through the Apennine Mountains via the Gran Sasso in Abruzzo.
There are two tunnels, each with two lanes for each direction, 10,176 km long, that also host the Laboratori Nazionali del Gran Sasso. Construction started on November 14, 1968. The eastbound tunnel (to Teramo) opened the December 1, 1984; while the westbound tunnel (to L'Aquila) opened in 1995.
It is the third longest road tunnel in Italy, after the Fréjus and Monte Bianco tunnels, and the longest road tunnel entirely on Italian territory.
