Boston’s Big Dig (1991–2007)
Massachusetts began burying Interstate 93 through downtown Boston and building the Ted Williams Tunnel. The project took more than 15 years and became a case study in cost overruns and construction disruption.
Traffic patterns changed and the city gained new surface land.
The project’s final cost and delays made it a reference point for large urban infrastructure.
Humboldt Park’s projects are smaller, but the Big Dig shows how announced construction dates can slip when design and procurement unfold.
