Sooo crunchy there, jeez! Tunneling isn't as unpredictable as you suggest, rail lines are often completed on time and under budget[1]. When you do crazy stuff l

Sooo crunchy there, jeez! Tunneling isn't as unpredictable as you suggest, rail lines are often completed on time and under budget[1]. When you do crazy stuff like try and build the largest tunnel ever built with cutting edge technology and don't plan for failure[2], that is when things go bad. Luckily, rail doesn't need giant tunnels, tunnel boring machines for that size tunnel are a known quantity. 1 - https://www.ch2m.com/newsroom/news/new-seattle-light-rail-line-opens-ahead-of-schedule-and-under-budget https://www.ch2m.com/newsroom/news/new-seattle-light-rail-li... 2 - http://q13fox.com/2016/07/21/bertha-seattle-tunnel-project-223-million-over-budget/ http://q13fox.com/2016/07/21/bertha-seattle-tunnel-project-2...