Quite an amazing effort, and the passing comparison to the Boston central artery/"big dig" was sobering.
The feedback loops are all wrong for getting a high value tunnel under Boston. They are at least less wrong in "beer Europe"[0] + Scandinavia.
Massachusetts government "pays itself first" Massachusetts people consider the problem unsolvable and tolerates it. Netherlands and the adjacent parts of Europe (i.e I make no claims about construction projects in Italy) generally takes a hard line against anything that's not "pro-social" so heads would roll if politicians and bureaucrats misused their public works on graft like the Massholes do.
Source: Masshole who geeks out on government accountability
[0]https://eu.greekreporter.com/files/tearing-europe-apart1.jpg
It also makes a lot of sense: fruit brandies are made of fruit like wine, but are as strong as vodka.