For someone interested in tunnel projects whose budget has gone overrun: Hallandsåsen in South Sweden. Mudy soil made for difficult digging. https://en.m.wikip

For someone interested in tunnel projects whose budget has gone overrun: Hallandsåsen in South Sweden. Mudy soil made for difficult digging. https://en.m.wikipedia.org/wiki/Hallands%C3%A5s_Tunnel https://en.m.wikipedia.org/wiki/Hallands%C3%A5s_Tunnel