Category: Engineering

The Big Dig and the Nature of Large Engineering Projects

I was fortunate to sit down for a rare interview with Fred Salvucci on the final episode of this season of the What’s New podcast. Fred is now at MIT, but he is well-known in the Boston area for conceiving and being the champion of a massive engineering project which came to be known as the Big Dig, and which completely transformed the city of Boston for the twenty-first century.

For most of its postwar existence, downtown Boston was split by a giant elevated highway called the Central Artery. The Artery was an artifact common to many cities in twentieth-century America, a terrible byproduct of the car-centric culture and suburbanization that flourished in the 1950s. Elevated roadways were aggressively cut through small-scale livable neighborhoods so that people could get into the city from the suburbs, and so that others could drive through a city without entering its local roadways on their way to distant destinations. Homes were often taken from people to make way for these elevated highways, and the walkability and attractiveness of cities suffered.

The Big Dig not only put the Central Artery underground, but added a massive linear park in the center of Boston, a marquee bridge that aptly reflected the famous Bunker Hill Monument, and another tunnel to Logan Airport. It thus completely reshaped the city and improved not only its transportation, but Boston’s skyline and its ground-level fabric and beauty. It reconnected neighborhoods and people.

In a wide-ranging conversation, Fred spoke to me about how the Big Dig was engineered—it was one of the biggest engineering projects in history, at a cost of $15 billion, through a 400-year-old city ($1 billion just to relocate ancient pipes and wires)—but also how he was able to get so many people on board for such a gigantic project. Indeed, as you’ll hear, Fred saw it more as a political and socio-economic project than a transportation initiative.

Moreover, Fred provides some good thoughts about the future of transportation, including the impact (likely negative, in his view) of self-driving cars, and whether we can ever find the will—and the funds—to do something like the Big Dig again. Do tune in.