Dewey Square Tunnel

The Dewey Square Tunnel in Boston, Massachusetts, is part of Interstate 93 (concurrent with US 1 and Route 3), running under the heart of the city's financial district, including Dewey Square. Built in 1959, it was part of Boston's Central Artery freeway construction project of the 1950s. Known to locals as the South Station Tunnel (due to its proximity to South Station), the Dewey Square Tunnel is of cut-and-cover design, and originally was six lanes wide (three in each direction), with no breakdown lanes. Because of public outcry during construction of The Central Artery, elevated for most of its length and reviled because it cut off views of and access to Boston's historic waterfront, it was decided by then-Governor John A. Volpe that the final section of the artery was to be put underground from just south of Congress Street to Kneeland Street near Boston's Chinatown section. At the time of its construction, it was the widest vehicular tunnel in the world. At one time, a bus terminal serving Peter Pan, Bonanza, and other regional bus lines sat atop the tunnel near its northern portal. The bus station has since been relocated to the major intermodal transportation hub at South Station. The lack of breakdown lanes, the limited number of travel lanes, and the myriad access ramps to and from the Artery and the tunnel caused massive traffic jams and gridlock, forcing transporta

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).