A series of concrete ceiling tiles in a tunnel portal collapsed on a moving car killing the passenger in downtown Boston in 2006. The selection of the epoxy used in the ceiling tile anchors was unusual and a failure to heed the warning signs were at odds on a huge project under pressure to deliver when already twice over time and five times over budget.
With John Chidgey.
Investigation Report:

• NTSB Report (PDF)

Technical Links:

• Epoxy
• Tunnel

Links of Potential Interest:

• Big Dig ceiling collapse
• Collapse of Big Dig Ceiling in Boston Is Tied to Glue
• Public demand for Big Dig accountability
• ‘Epoxy Creep’ Main Factor in Big Dig Ceiling Panel Collapse
• $28M settlement in fatal Big Dig Collapse
• Big Dig Ramp Reopens
• HNTB
• The Big Dig Tunnels and Bridges

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Episode Gold Producer: 'r'.
Episode Silver Producers: Mitch Biegler, John Whitlow, Kevin Koch, Oliver Steele, Hafthor and Shane O'Neill.

With thanks to Sean for the topic suggestion.