Callahan Tunnel
The downtown Boston entrance to the tunnel | |
| Overview | |
|---|---|
| Location | Boston, Massachusetts |
| Coordinates | 42°22′04″N 71°2′46″W / 42.36778°N 71.04611°W |
| Status | Open |
| Route | Route 1A north |
| Start | Downtown Boston |
| End | East Boston |
| Operation | |
| Constructed | high-strength steel and concrete infill |
| Opened | November 11, 1961 |
| Owner | Commonwealth of Massachusetts |
| Operator | Massachusetts Department of Transportation |
| Toll | Between $0.20 and $2.05 |
| Technical | |
| Length | 0.96 mi (1.54 km) |
| No. of lanes | 2 |
| Operating speed | 40 mph (64 km/h) |
| Tunnel clearance | 13.4 ft (4.1 m) |
| Width | 24.2 ft (7.4 m) |
The Lieutenant William F. Callahan Jr. Tunnel (colloquially Callahan 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.