Leverett Circle Connector Bridge

The Leverett Circle Connector Bridge is a 1.7 mile-long highway bridge over the Charles River in Boston, Massachusetts, carrying two lanes each of northbound and southbound traffic. It connects to Interstate 93 (I-93) at the northern end (exit 18, formerly 26 from I-93 south) and splits at the southern end, providing direct access to both Storrow Drive and Leverett Circle in Boston. Going northbound, there is also a fork which provides access to the City Square Tunnel under Charlestown to proceed on U.S. Route 1 (US 1) northbound via the Tobin Bridge.

Leverett Circle Connector
Leverett Circle Connection, c. 2005
Coordinates	42.36909°N 71.06459°W / 42.36909; -71.06459
Carries	highway access ramp
Crosses	Charles River
Locale	Boston, Massachusetts
Characteristics
Design	Box girder bridge
Material	Steel
Total length	1.7 miles (2.7 km)[1]
History
Opened	October 7, 1999 (1999-10-07)
Location

The span was built in conjunction with the more dramatic Leonard P. Zakim Bunker Hill Bridge as part of the Central Artery/Tunnel Project, widely known as the Big Dig. During construction, the Leverett Circle Connector Bridge was sometimes called "Baby Bridge".^[2] The bridge opened for traffic on October 7, 1999,^[3] at a cost of $22.27 million (equivalent to $38.3 million in 2023^[4]).^[5]

Also known as the Storrow Drive Connector, it is the largest steel box girder bridge in the United States. It was the winner of a July 2001 National Steel Bridge Alliance (NSBA) "prize bridge" award.^[6] Its weaving design^{[further explanation needed]} was determined by the other major structures involved in the Big Dig but unlike other parts of the project, it was finished eight days ahead of schedule.^[5]

Major intersections

The entire route is in Boston, Suffolk County. All exits are unnumbered.

Location	mi[1]	km	Destinations	Notes
West End	0.0	0.0	Route 28 north (O'Brien Highway) – Leverett Circle, North Station	At-grade intersection; North Station access via Nashua Street
	0.2	0.32	Route 28 south / Route 3 north (Storrow Drive)	Southbound exit and northbound entrance; no commercial vehicles
Charles River	0.4– 0.5	0.64– 0.80	Bridge
Charlestown	0.7	1.1	US 1 north (Tobin Bridge) – Revere	E-ZPass or pay-by-mail tolls on bridge; loop ramp via City Square Tunnel
	1.7	2.7	I-93 north – Concord, NH	Exit 18 on I-93; Somerville city line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Electronic toll collection       Incomplete access

Gallery

• 
  Leverett Circle as seen behind North Station during Big Dig construction.
• 
  Part of the rebuilt connector bridge at right.

See also

• Engineering portal
• Massachusetts portal
• Transport portal