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List of Interstate Highways in Massachusetts

Interstate Highways in Massachusetts
Interstate 90 marker
Interstate 495 marker
Highway marker for I-90 and I-495
Map
Interstate Highways highlighted in red
System information
Maintained by MassDOT
Length565.63 mi[2] (910.29 km)
FormedAugust 14, 1957[1]
Highway names
InterstatesInterstate nn (I-nn)
System links

The Interstate Highways in Massachusetts comprise five current primary Interstate Highways and eight auxiliary Interstates. In addition, two auxiliary Interstates were proposed and then cancelled.

The longest Interstate Highway in Massachusetts is I-90 with 136 miles, followed by I-495 with 121 miles.

Several freeway projects in the Boston area planned as part of the Interstate Highway System were cancelled in the 1970s following community opposition, including the Inner Belt (I-695) and Southwest Expressway (I-95).[3] The Big Dig megaproject in the 1990s and 2000s, which realigned several highways in Downtown Boston, included a new tunnel for I-93 to replace the Central Artery and an extension of I-90 via the Ted Williams Tunnel.[4]

Primary Interstate Highways

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Number Length (mi)[5] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-84 8.15 13.12 I-84 at Union, CT I-90 in Sturbridge 01958-01-011958 01971-01-011971 Replaced part of former Route 15; Replaced by I-86
I-84 8.15 13.12 I-84 at Union, CT I-90 in Sturbridge 01984-01-011984 current Renumbered back from I-86
I-86 8.15 13.12 I-84 at Union, CT I-90 in Sturbridge 01971-01-011971 01984-01-011984 Replaced I-84; was later reverted back to I-84
I-89 — — — — 01956-01-011956 01960-01-011960 Proposed to replace US 7 in original 1956 plan; rerouted prior to construction
I-90 135.72 218.42 I-90 at Canaan, NY Route 1A in Boston 01958-01-011958 current Follows the Massachusetts Turnpike
I-91 54.99 88.50 I-91 at Enfield, CT I-91 at Brattleboro, VT 01958-01-011958 current
I-93 47.07 75.75 I-95/US 1/Route 128 in Canton I-93 at Salem, NH 01957-01-011957 current
I-95 91.95 147.98 I-95 at Pawtucket, RI I-95 at Seabrook, NH 01957-01-011957 current
I-95E 40.73 65.55 I-95E at E.Providence, RI — 01957-01-011957 01959-01-011959 Replaced by I-195
  •       Former

Auxiliary Interstate Highways

[edit]
Number Length (mi)[6] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-190 19.26 31.00 I-290 in Worcester Route 2 in Leominster 01983-01-011983 current
I-195 40.73 65.55 I-195 at E.Providence, RI I-495 at Wareham 01959-01-011959 current Replaced I-95E
I-290 20.16 32.44 I-395/I-90 in Auburn I-495 in Marlborough 01970-01-011970 current
I-291 5.44 8.75 I-91/US 20 in Springfield I-90 in Chicopee 01972-01-011972 current also known as the Springfield Expressway
I-295 4.23 6.81 I-295 at Cumberland, RI I-95 in Attleborough 01969-01-011969 current
I-391 4.46 7.18 I-91 in Chicopee High Street in Holyoke 01970-01-011970 current
I-395 11.91 19.17 I-395 at Thompson, CT I-290 in Auburn 01983-01-011983 current
I-495 121.56 195.63 Route 25 in Wareham I-95 in Salisbury 01960-01-011960 current Second longest auxiliary Interstate highway in the United States
I-495 BS 2.88 4.63 US 3 in Chelmsford Gorham Street in Lowell 01962-01-011962 current Unsigned; known as Lowell Connector; signs were posted at one time on local streets intersecting the Connector
I-695 — — I-95 in Boston I-93 in Charlestown 01957-01-011957 01971-01-011971 Cancelled before it was constructed
I-895 — — I-895 at Warren, RI I-95 and I-295 in Attleboro 01968-01-011968 01982-01-011982 Cancelled before it was constructed
  •       Former

See also

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References

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  1. ^ Public Roads Administration (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways as Adopted by the American Association of State Highway Officials August 14, 1957 (Map). Scale not given. Washington, DC: Public Roads Administration. Retrieved November 22, 2010 – via Wikimedia Commons.
  2. ^ Adderly, Kevin (January 15, 2014). "Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico". Route Log and Finder List. Federal Highway Administration. Retrieved May 20, 2014.
  3. ^ McDonald, Danny (December 5, 2022). "Transformative decision a half-century ago to scrap I-95 extension still resonates in Boston today". The Boston Globe. Archived from the original on December 5, 2022. Retrieved December 5, 2022.
  4. ^ "The Big Dig: tunnels and bridges". Massachusetts Department of Transportation. Retrieved December 5, 2022.
  5. ^ Adderly, Kevin (January 15, 2014). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2013". Route Log and Finder List. Federal Highway Administration. Retrieved May 20, 2014.
  6. ^ Adderly, Kevin (October 31, 2002). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2013". Route Log and Finder List. Federal Highway Administration. Retrieved May 20, 2014.