The GBT cost almost 10 billion. Still way less than the 22 Billion the big dig in Boston cost that put the highway under the city. Initial estimate was 2.8 Bill

The GBT cost almost 10 billion. Still way less than the 22 Billion the big dig in Boston cost that put the highway under the city. Initial estimate was 2.8 Billion. Meanwhile the city of Zürich dug a 4.8 km train tunnel and lost (permanently stuck and removal impossible because of possible collapse) a TBM during work almost collapsing the Bahnhofplatzt for just around 2 Billion. [1] https://en.m.wikipedia.org/wiki/Weinberg_Tunnel https://en.m.wikipedia.org/wiki/Weinberg_Tunnel [2] https://www.zvv.ch/zvv/de/ueber-uns/projekte/in-betrieb/durchmesserlinie.html https://www.zvv.ch/zvv/de/ueber-uns/projekte/in-betrieb/durc...