🌉 InfrastructureCOSTLY
How much did Boston's “Big Dig” cost?
Moving the I-93 highway underground through central Boston (completed 2007)
💡 Moving a city highway into tunnels under central Boston. Originally budgeted at a few billion – then costs exploded.
Answer
€10.7B
€10,700,000,000 · Total cost · 2007
Originally estimated at US$2.8B in 1982. Leaks, a fatal ceiling collapse and endless delays made it the most expensive highway project in US history.
About US$14.6B, converted at the 2007 rate; with interest well over US$20B.
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