Connecting Ubaye valley with Embrun
21st highest road in Europe (2780m)
Absolute highest tunnel Europe (2637m)
Westside 27 km, elevation average 6.3%
Built by French Army in 1891-1911
Important connection to fort Tournoux
Tunnel winter closed with metal doors
Inside 500 mtr ice, mud and dirt
Down hill sheeps and wild dogs
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