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 the city's main train 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.