🇺🇸 United States · 2012 · 🏗️ Megaprojects
Bury a highway under a city. How hard could it be?
💸 Guess, then reveal the price
US$24.3 billion full cost estimate
Boston dug a hole so deep, taxpayers are still climbing out in 2038.
What actually happened
Moving Interstate 93 underground was long reported at about $15 billion. A 2012 analysis put the complete cost at about $24.3 billion, with debt payments scheduled through 2038. The project did transform downtown Boston.
Source: WBUR ↗ · Amount in original currency, not adjusted for inflation. An unusual cost is not automatically waste; see how we check the facts.