Leonard P. Zakim Bunker Hill Memorial Bridge The Leonard P. Zakim Bunker Hill Memorial Bridge, a cable-stayed bridge completed in 2003, spanning the Charles River in Boston. The bridge was built as part of the Big Dig project, the largest and most expensive highway infrastructure project in American history. (more) Big Dig tunnel project, Boston, Massachusetts, United States Actions Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Big-Dig Share Share Share to social media Facebook X URL https://www.britannica.com/topic/Big-Dig Also known as: Central Artery/Tunnel Project Written by Roland Martin Roland Martin is a freelance writer living in San Francisco. Roland Martin Fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors. The Editors of Encyclopaedia Britannica Last Updated: Oct 22, 2024 • Article History Table of Contents Byname of: Central Artery/Tunnel Project (Show more) Ask the Chatbot a Question Ask the Chatbot a Question Big Dig, the largest and most expensive highway infrastructure project in American history. Initially conceived in the 1970s and begun in 1991, it took 15 years of construction to reroute Boston’s major highway, Interstate Highway 93 (I-93), through an underground tunnel. The project was plagued with issues throughout its planning and construction, causing many delays and massive cost overruns. Once finished in 2007, however, the Big Dig successfully reduced traffic congestion in downtown Boston and created space for more than 45 public parks and plazas. The Central Artery, an elevated highway running through the heart of Boston, opened in 1959. ...(100 of 902 words)

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