"... longest and deepest rail tunnel ..." and "... delivered on time and within budget ..." Only in Switzerland, I guess. :) I wish there were better write ups of how the planning for this came together and what differs from other somewhat similar huge projects.
[1] https://en.m.wikipedia.org/wiki/Stockholm_City_Line
[2] in Swedish. http://framtidensinfrastruktur.se/artikel/snart-fardigbyggt-...