Boston Central Artery

Boston Central Artery
Name	Central Artery
Other name	John F. Fitzgerald Expressway
Location	Boston, Massachusetts
Route	Interstate 93
Opened	1959
Closed	2003 (elevated), replaced 2007 (tunnel completion)
Length mi	3.5
Notable	Elevated freeway through Downtown Crossing, North End

Boston Central Artery The Boston Central Artery was an elevated section of Interstate 93 running through Downtown Boston that reshaped Boston transportation, urban planning, and civic life from the mid-20th century into the 21st century. Conceived amid postwar highway expansion influenced by the Federal-Aid Highway Act of 1956, the Artery affected neighborhoods such as Beacon Hill, South End, Back Bay, and the North End, and intersected with routes to Logan International Airport, Massachusetts Turnpike, and the Ted Williams Tunnel. Its replacement via the Big Dig project became one of the largest and costliest infrastructure undertakings in United States history.

History

The Artery originated from mid-century urban renewal policies championed by figures connected to John F. Kennedy era planning and state leaders, intersecting with initiatives like the Federal-Aid Highway Act of 1956, urban schemes endorsed by the Boston Redevelopment Authority, and debates involving civic groups such as the Boston Preservation Alliance. Groundbreaking reflected tensions akin to those in other cities after World War II where elevated freeways preceded subterranean solutions, paralleling controversies seen in New York City and Chicago. Construction in the 1950s and 1960s coincided with major events like the expansion of Logan International Airport and the realignment of U.S. Route 1 through New England corridors.

Design and Route

Engineered as a multi-lane elevated expressway, the Artery carried Interstate 93 traffic from the South End northward past Boston Common toward the North End and Charlestown crossings. The route linked to the Massachusetts Turnpike (I‑90) at the Rotary, merged near ramps feeding the Tobin Bridge, and served regional arteries toward Cambridge and Somerville. Its design featured steel-and-concrete viaducts, ramps adjacent to landmarks such as Faneuil Hall and Government Center, and complex interchanges influenced by standards from American Association of State Highway and Transportation Officials practice. The alignment bisected historic districts including Beacon Hill and transit hubs like the South Station complex.

Construction and Engineering

Construction employed techniques prevalent in mid-20th century freeway programs, mobilizing contractors and engineers with ties to firms that worked on projects like the Massachusetts Turnpike Authority initiatives and Portsmouth Naval Shipyard expansions. Foundations used pile driving and caisson work in congested urban soils shaped by earlier landfill for the Back Bay and riverine fill near the Charles River. Structural elements adopted prefabricated steel spans and reinforced concrete decks; drainage and ventilation systems echoed designs used in tunnels by agencies overseeing the Lincoln Tunnel and Holland Tunnel. Maintenance regimes had to address corrosion from winter salting practices near the Charles River embankments and pollution impacts similar to those confronting New Bedford and other New England ports.

Impact and Controversies

The Artery produced enduring debates linking Robert Moses-style highway building to local resistance exemplified by groups akin to the Highway Beautification Commission and neighborhood advocates in West End and South Boston. Critics argued the freeway induced displacement, property devaluation around North End rowhouses, and severed pedestrian connections to sites like Boston Common and Faneuil Hall Marketplace. Supporters cited faster access to Logan International Airport and improved throughput on Interstate 93 for commuters from Quincy and Braintree. Environmental and legal challenges mirrored cases before the United States Environmental Protection Agency and invoked legislation such as the National Environmental Policy Act in litigation that influenced later remediation and mitigation strategies.

Big Dig and Replacement

The decision to submerge the Artery culminated in the Central Artery/Tunnel Project, widely known as the Big Dig, undertaken by the Massachusetts Turnpike Authority with federal participation from the Federal Highway Administration. Engineers adapted tunneling methods including sequential excavation and slurry wall construction used on projects like the Big Ben-era undertakings in London and large-scale urban tunnels in Seattle and Los Angeles. The program faced cost overruns, project management disputes involving firms such as Bechtel and contractors linked to the Turner Corporation, and safety incidents that prompted probes by the National Transportation Safety Board and hearings in the Massachusetts General Court. Completion restored surface parcels that enabled development projects around Rose Fitzgerald Kennedy Greenway and influenced urban renewal initiatives related to institutions like Massachusetts Institute of Technology and Harvard University through regional traffic changes.

Current Status and Operations

Today the former elevated corridor is replaced by a tunneled alignment of Interstate 93 with surface parks and mixed-use developments along the Rose Fitzgerald Kennedy Greenway, managed by entities including the Massachusetts Department of Transportation and the Rose Kennedy Greenway Conservancy. Traffic operations integrate monitoring systems akin to those in New York City and Los Angeles managed by the Federal Highway Administration standards, while maintenance, inspection, and emergency response coordinate with Massachusetts State Police, the Boston Police Department, and transit agencies such as the Massachusetts Bay Transportation Authority. The transformation continues to inform debates among planners at institutions including the American Planning Association, historic preservationists at the National Trust for Historic Preservation, and civic leaders in Boston City Council on urban mobility and redevelopment strategies.

Category:Roads in Boston Category:Interstate Highways