Interstate 84
Wilbur Cross Highway
I-84 highlighted in red
Route information
Maintained byMassDOT
Length	8.15 mi[1] (13.12 km)
Existed	1958–present
History	Route 15 (1948–1980) I-84 (1958–1971, 1984–present)[2] I-86 (1971–1984)
NHS	Entire route
Major junctions
West end	I-84 at theConnecticut state line
Major intersections	US 20 inSturbridge
East end	I-90 Toll /Mass Pike in Sturbridge
Location
Country	United States
State	Massachusetts
Counties	Hampden,Worcester
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Massachusetts State Highway System Interstate US State
←Route 83 →Route 85
←Route 85 I-86 →Route 86 ←Route 14 Route 15 →Route 15

Interstate 84 (I-84) inMassachusetts is the easternmost segment of the eastern I-84 freeway originating inDunmore, Pennsylvania, nearScranton. Within Massachusetts, I-84 exists in the towns ofHolland andSturbridge. Known as theWilbur Cross Highway, it has also been signed asRoute 15 between 1948 and 1980 as well asInterstate 86 (I-86) between 1971 and 1984. The Massachusetts segment of I-84 is the shortest state length of the four states it travels through.

TheWilbur Cross Highway continues on I-84 after the highway enters Massachusetts. For a short distance (approximately 90 yards (82 m) eastbound and 200 yards (180 m) westbound), the Interstate passes through the town ofHolland inHampden County before crossing intoSturbridge inWorcester County for the remainder of its length. I-84 has only three exits in Massachusetts, one of them being a major road, which isU.S. Route 20. The road then ends atI-90, theMassachusetts Turnpike. I-84 ends at exit 78 (formerly exit 9) of I-90, which is located in Sturbridge. The length of I-84 in Massachusetts is 8.15 miles (13.12 km), making the Massachusetts section of I-84 the shortest distance within any of the four states it traverses.

The highway originated as Route 15, an extension ofConnecticut Route 15 (then known as theWilbur Cross Highway). The extension started in Holland, and, within1⁄4 mile (0.40 km), it entered Sturbridge as Mashapaug Road. It then followed Haynes Road to Sturbridge Center ending atRoute 131.^[3]

Between 1949 and 1952, theMassachusetts Department of Public Works (MassDPW) initiated construction of the Wilbur Cross Highway extension toUS Route 20 (US 20) in Sturbridge, with two lanes in each direction separated by a wide median and frequent U-turns.^[4][5]

Between 1955 and 1957, an extension was created to connect Route 15 to the newMassachusetts Turnpike, which opened on May 15, 1957. In 1958, I-84 was cosigned with Route 15 north and east ofEast Hartford, Connecticut, into Massachusetts.

In late 1968, theFederal Highway Administration (FHWA) approved a new Interstate connection fromHartford, Connecticut, toProvidence, Rhode Island, which was to become part of a rerouted I-84. As a result, the existing section of I-84 fromManchester, Connecticut, toI-90 (overlapping Route 15) was redesignated I-86.

Shortly thereafter, MassDPW embarked on a reconstruction of its portion of the highway with new and reconstructed carriageways providing three 12-foot-wide (3.7 m) lanes and standard shoulders. Both carriageways were separated by a wide, forested variable median. New bridges, interchanges, and weigh stations were erected along the route. The $20-million (equivalent to $108 million in 2024^[6]) reconstruction project was completed in 1973. (Similar improvements in Connecticut were not completed until the 1980s.)

On October 1, 1980, theConnecticut Department of Transportation (CTDOT) decided to truncate Route 15 back to I-84 exit 57 (where it ends today), eliminating the overlap with I-86. Simultaneously, Massachusetts eliminated the overlap by decommissioning its Route 15 entirely.

When the planned portion of I-84 towardProvidence ran into opposition inRhode Island and was canceled in 1983, I-86 was officially reverted to I-84. The I-86 numbering was officially deleted on December 12, 1984. Plans to connect I-84 along the present dayI-384/US 6 corridor from Hartford to Providence were scuttled for environmental reasons. As a result, I-84 was rerouted back onto the completed I-86 freeway.

TheMassachusetts Department of Transportation (MassDOT) planned to convert I-84, along with the rest of the state's Interstates, to usemilepost-based exits during 2016;^[7] however, this project was indefinitely postponed until November 18, 2019, when MassDOT confirmed that beginning in late summer 2020 the exit renumbering project will begin.^[8] On February 10, 2021, MassDOT announced in a blog post that the exit renumbering on I-84 will begin on February 28 and last for a week.

County	Location[9]	mi[9]	km	Old exit	New exit[10]	Destinations	Notes
Hampden	Holland	0.000	0.000			I-84 west (Wilbur Cross Highway) –Hartford	Continuation intoConnecticut; formerI-86
Worcester	Sturbridge	0.289	0.465			Haynes Street	Westbound entrance only
		3.252	5.234	1	3	Mashapaug Road –Southbridge,Sturbridge	Access via Haynes Street
		5.077	8.171	2	5	ToRoute 131 –Sturbridge,Southbridge	Access via Haynes Street
		6.550– 6.869	10.541– 11.055	3	6	US 20 –Charlton,Palmer	Signed as exits 6A (US 20 east) and 6B (US 20 west)
		7.710	12.408			I-90 Toll /Mass Pike –Worcester,Boston,Springfield,Albany, NY	Eastern terminus; exit 78 on I-90 / Mass Pike
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Electronic toll collection       Incomplete access

• Massachusetts portal
• U.S. Roads portal

Interstate 84
Previous state: Connecticut	Massachusetts	Next state: Terminus

• Interstate 84 (Pennsylvania–Massachusetts)
• Interstate Highways in Massachusetts
• Transportation in Hampden County, Massachusetts
• Transportation in Worcester County, Massachusetts

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