Another very long trans-alpine railway tunnel in construction 250 km to the east: https://en.wikipedia.org/wiki/Brenner_Base_Tunnel https://en.wikipedia.org/wik

Another very long trans-alpine railway tunnel in construction 250 km to the east: https://en.wikipedia.org/wiki/Brenner_Base_Tunnel https://en.wikipedia.org/wiki/Brenner_Base_Tunnel It's nowhere near completion, though. Length: 34 mi Cost: $11.5 billion Construction: 2007 - 2025 (est)