Callahan Tunnel

The Lieutenant William F. Callahan Jr. Tunnel is a road tunnel under Boston Harbor between the North End and East Boston. It carries northbound Massachusetts Route 1A, forming a one-way pair with the Sumner Tunnel. Opened in 1961 to complement the Sumner Tunnel, it carried all northbound traffic under the harbor until the Ted Williams Tunnel opened in the 1990s as part of the Big Dig.

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Wikimedia, Wikidata
Massachusetts Department of Transportation, road tunnel, United States, 

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Location: 42.3678, -71.0461, KML, Cluster Map, Maps,
12 places

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  Big Dig ⓘ
  highway project

• 

  Callahan Tunnel ⓘ
  tunnel in Boston

• 

  Fort Point Tunnel ⓘ
  road tunnel in Boston, Massachusetts

• 

  Prudential Tunnel ⓘ
  tunnel in Boston, Massachusetts

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  South Boston CSO Storage Tunnel ⓘ
  

• 

  Tremont Street Subway ⓘ
  Boston subway tunnel

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  Winter Street Concourse ⓘ
  pedestrian tunnel in Boston, Massachusetts

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  Walden Street Cattle Pass ⓘ
  

• 

  Sumner Tunnel ⓘ
  tunnel in Boston

• 

  Dewey Square Tunnel ⓘ
  tunnel in Massachusetts

• 

  Ted Williams Tunnel ⓘ
  tunnel in Boston

• 

  Thomas P. O'Neill Jr. Tunnel ⓘ
  tunnel in Boston

1857-01-01T00:00:00Z

1857-01-01T00:00:00Z

1857 Walden Street Cattle Pass

1934-01-01T00:00:00Z

1934-01-01T00:00:00Z

1934 Sumner Tunnel

1959-01-01T00:00:00Z

1959-01-01T00:00:00Z

1959 Dewey Square Tunnel

1995-01-01T00:00:00Z

1995-01-01T00:00:00Z

1995 Ted Williams Tunnel

2003-01-01T00:00:00Z

2003-01-01T00:00:00Z

2003 Thomas P. O'Neill Jr. Tunnel

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Frameless

I-93 and Callahan Tunnel ramps from New Chardon Street, June 2025

Callahan Tunnel (16870891013)

Lieutenant William F. Callahan Tunnel, Boston (22084667302)

West entrance to the Callahan Tunnel, December 2021

Callahan Tunnel maintenance ramp, June 2025

West portal of the Callahan Tunnel, June 2025

Type	Subtype	Date	Description	Notes	Source
site	tunnel		Big Dig	tunnel, transport megaproject, controlled-access highway	Wikidata
site	tunnel		Callahan Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
site	tunnel		Fort Point Tunnel	tunnel	Wikidata
site	tunnel		Prudential Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
site	tunnel		South Boston CSO Storage Tunnel	tunnel	Wikidata
site	tunnel		Tremont Street Subway	subway tunnel	Wikidata
site	tunnel		Winter Street Concourse	pedestrian tunnel	Wikidata
site	tunnel	1857	Walden Street Cattle Pass	tunnel	Wikidata
site	tunnel	1934	Sumner Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
site	tunnel	1959	Dewey Square Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
site	tunnel	1995	Ted Williams Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
site	tunnel	2003	Thomas P. O'Neill Jr. Tunnel	Massachusetts Department of Transportation, road tunnel	Wikidata
commons	image		I-93 and Callahan Tunnel ramps from New Chardon Street, June 2025		Commons
commons	image		Callahan Tunnel (16870891013)		Commons
commons	image		Lieutenant William F. Callahan Tunnel, Boston (22084667302)		Commons
commons	image		West entrance to the Callahan Tunnel, December 2021		Commons
commons	image		Callahan Tunnel maintenance ramp, June 2025		Commons
commons	image		West portal of the Callahan Tunnel, June 2025		Commons