Brenner Base Tunnel

Brenner Base Tunnel
https://engineers-channel.blogspot.com/p/tunnels.html

The Brenner Base Tunnel is a 55-kilometre-long (34 mi) railway tunnel under construction through the base of the Eastern Alps beneath the Brenner Pass. Upon completion, it will be the second or third longest railway tunnel in the world, after the Gotthard Base Tunnel in Switzerland and (depending on their relative completion dates) the Mont d'Ambin Base Tunnel between France and Italy. It will run from near Innsbruck, in Austria, to Franzensfeste/Fortezza, in Italy, replacing part of the current Brenner railway. The line is part of Line 1, the Berlin to Palermo route, of Trans-European Transport Networks (TEN-T).