Why Do Megaprojects Fail?

From Boston's Big Dig to San Francisco's Bay Bridge, it seems like every major infrastructure project opens years late and goes billions over budget. So why do these projects keep getting built? And who should citizens blame when they fail?
This video is based on the work of Bent Flyvberg, a researcher at Oxford.
Here's one of his article, about why megaprojects fail so often: bit.ly/1pILzS5
And an interview with more examples: www.econtalk.or...