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Length of the section: 4.217 km. Some unique features worthy of mention are the El Fresno tunnels, 949 m in length on the right-hand lane and 923 m in length on the left-hand lane. The section includes the Dóriga junction.
Grado-Dóriga, Asturias, Spain
10 structures; 1 viaduct, 3 overpasses, 6 underpasses, as well as 2 tunnels, totalling 1,892 m in length