|Length:||290.37 mi (467.31 km)|
|South end:||I-95 / Conn. Turnpike in New Haven, CT|
|North end:||A-55 at the Canadian border at Derby Line, VT|
|States:||Connecticut, Massachusetts, Vermont|
State highways in Vermont
Interstate 91 (I-91) is an Interstate Highway in the New England region of the United States. It provides the primary north–south thoroughfare in the western part of New England. The Interstate's southern end is in New Haven, Connecticut at Interstate 95 and its northern end is at Derby Line, Vermont, a village in the town of Derby, at the Canadian border, where it continues past the Derby Line-Rock Island Border Crossing as Autoroute 55. I-91 is the longest of three Interstate highways whose entire route is located within the New England states, and is also the only primary (two-digit) Interstate Highway in New England to intersect all five of the others that run through the region. The largest cities along its route are Springfield, Massachusetts, Hartford, Connecticut, and New Haven, Connecticut, in order from north to south.
Interstate 91 is 290 miles (470 km) long and runs nearly straight north and south: 58 miles (93 km) in Connecticut, 55 miles (89 km) in Massachusetts, and 177 miles (285 km) in Vermont. I-91 parallels U.S. Route 5 for all of its length, and many of the exits along I-91 provide direct or indirect access to the older route. Much of the route of Interstate 91 follows the Connecticut River, running from Hartford, Connecticut northward to St. Johnsbury, Vermont.
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Interstate 91 is the major north–south transportation corridor for the center of the state. It is the main route between the larger cities of New Haven, Hartford, and Springfield, Massachusetts. As such, it is almost always heavily trafficked (especially during rush hour), and maintains at least three lanes in each direction through Connecticut except for a short portion in Hartford at the interchange with Interstate 84 and in Meriden at the interchange with Route 15. The three cities also serve as Connecticut's control points along its length of the Interstate. Overhead signs in each direction consistently feature one or two of the cities, although very few (if any) conventional highway mileage signs are placed along the Interstate in Connecticut that indicate the remaining distance between the cities.
The highway begins just east of downtown New Haven at the intersection with the Connecticut Turnpike, Interstate 95, and Connecticut Route 34 at the Pearl Harbor Memorial Bridge, or Q Bridge as referred to by the locals. At the bottom of the ramp for exit 5, U.S. Route 5 begins at the first of its many interchanges with the freeway. Leaving New Haven, I-91 follows a northeastward trek through the suburbs of North Haven and Wallingford before entering the city of Meriden. In Meriden, about halfway between Hartford and New Haven, I-91 sees an interchange with its first spur route, Interstate 691. I-691 provides a westward link to Interstate 84 and the city of Waterbury. Leaving Meriden, I-91 travels briefly through Middletown before passing through Cromwell, Rocky Hill, and Wethersfield, eventually entering the Hartford city limits. Just south of Hartford, the highway begins to directly parallel the Connecticut River. In Hartford, I-91 meets I-84 before leaving the city limits. I-91 maintains an urban character throughout its distance to Springfield. Halfway between the two cities, exit 40 provides direct access (via Connecticut Route 20) to the Bradley International Airport. I-91 runs through Windsor, Windsor Locks, East Windsor and Enfield (with several exits in each town) before crossing into Massachusetts at milepost 58.
I-91's final exit in Connecticut is exit 49, which offers northbound travelers access to Longmeadow, Massachusetts, after which I-91 enters Massachusetts.
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Interstate 91 travels 55 miles (89 km) through the Pioneer Valley of western Massachusetts paralleling the Connecticut River. I-91 serves as the major transportation corridor through three Massachusetts counties, linking the cities of Springfield, Northampton, and Greenfield. The three cities serve as the control cities listed on guide and mileage signs, along with Brattleboro, Vermont beginning with the first northbound conventional mileage sign (63 miles (101 km)) in Longmeadow.
In Springfield, I-91 intersects with Interstate 291 at exit 8, a 5.44-mile-long (8.75 km) spur going eastbound connecting with the Massachusetts Turnpike, for travelers going either east to Boston or west to Albany, New York.
North of Springfield, I-91 briefly enters Chicopee itself where there is an interchange with the spur of Interstate 391 at exit 12 before turning westward to cross the Connecticut River into West Springfield. I-391 provides direct access to Holyoke center, while I-91 continues on the western side of the river.
Just after the river crossing, exit 14 is a major interchange with the Massachusetts Turnpike (I-90) before entering the city of Holyoke where exit 15 is located. Just after exit 16 U.S. 202, I-91 goes from three lanes to two lanes in each direction to the Vermont state line.
After a short exit-less stretch, I-91 enters Northampton, passing the Northampton Airport and an oxbow lake. The towns of Hadley and Amherst, home to the main campus of the University of Massachusetts Amherst, are accessible from I-91 exits in Northampton via Route 9.
Continuing north, I-91 enters Hatfield, and where it begins its straightest section—nearly six miles (9.7 km) without a bend in the road. Several exits provide access to U.S. Route 5 and Massachusetts Route 10 in Hatfield and Whately before entering Deerfield.
I-91 has two exits in Greenfield. At exit 26, there is a rest area/visitor information center for Franklin County. Exit 28 in Bernardston is the last exit in Massachusetts. Beyond exit 28, I-91 continues for about five miles (8.0 km) more before crossing into Vermont.
The 55-mile (89 km) stretch of I-91 in Massachusetts was the last section that featured motorist-aid call boxes. The call boxes were important as a good part of I-91 in Massachusetts is rural, unlike many other freeways in the state. The call boxes were eventually removed in 2012. Massachusetts is the only state traversed by Interstate 91 where another numbered highway is co-signed onto the Interstate (in this case, US 5, for a one-half mile (800 m) spur near the Springfield-Longmeadow town line and Route 2, for approximately three miles (4.8 km) in Greenfield).
I-91 runs along the eastern border of Vermont and serves as a major transportation corridor for eastern Vermont and western New Hampshire. Many exits along Vermont's length of I-91 feature New Hampshire towns on the guide signs (for example, exit 3, which lists Brattleboro and "Keene, NH", as the points of access). I-91 length within Vermont is 177 miles (285 km), and has two lanes in each direction the entire way from the Massachusetts state line at Guilford to Derby Line at the Canadian border (nearly two-thirds of I-91's length) with 29 Vermont interchanges. The highway's rural character and long distances between exits in Vermont are in stark contrast to its south, where exits are more frequent and the road carries four lanes of traffic in each direction at some points. The major "control cities" in Vermont are Brattleboro, White River Junction, St. Johnsbury, and Newport. When re-entering northbound I-91 at exit 28 in Derby, the "control city" sign is for Canada. Of these destinations, only Newport is a city, although the other towns are sizable. In general, the road parallels its predecessor, US 5.
I-91 enters Vermont in the town of Guilford. Just before exit 1 in Brattleboro is the Vermont Welcome Center & Rest Area, which has a staffed Tourist Information Center, and has a self-service lottery machine for instant tickets as well as drawing games.
The first three Vermont exits (northbound) serve the town of Brattleboro. At exit 1, northbound Route 5 provides access to stores and a small industrial area before reaching the south end of the town's center, where a bridge crosses the Connecticut River into Hinsdale, New Hampshire via NH Route 119. Exit 2/Route 9 provides access to the western village of the town (West Brattleboro), then continues west to Marlboro, Wilmington and Bennington. Brattleboro's main retail strip is located at and just south of the exit 3 trumpet interchange and traffic circle. Following Vermont Route 9 eastward, one can reach Keene, New Hampshire in 15 miles (24 km).
After exit 3, I-91 heads north to pass through the towns of Dummerston, Putney, Westminster, Rockingham, Springfield, Weathersfield, Windsor, Hartland, and Hartford, home of the village of White River Junction. White River Junction, listed as a control city on mileage signs as far south as Greenfield, Massachusetts, is where I-91 and I-89 meet and provide access to many points in Vermont and New Hampshire, at exit 10.
North of the interchange with I-89, I-91 continues towards St. Johnsbury and passes through the towns of Norwich, Thetford, Fairlee, Bradford, Newbury (with access to the village of Wells River), and Barnet, before coming to its next major intersection. Towns in New Hampshire on the other side of the river can also be easily accessed in this stretch. At exit 19 is the northern terminus of Interstate 93, a major interstate highway in New England, which provides a direct route south through the White Mountains and to almost all major cities in New Hampshire. Just after exit 19, there are three exits for St. Johnsbury, including a major intersection with U.S. Route 2. Along westbound US 2, the capital of Vermont, Montpelier, is eventually reached from I-91, although I-89 provides Montpelier with immediate Interstate access.
Interstate 91 continues northward, now following the Passumpsic River valley. It passes through Vermont's Northeast Kingdom region and the town of Lyndon. Two exits in Lyndon serve the village of Lyndonville and Lyndon State College. After exit 24, I-91 departs Route 5, which it had been closely paralleling since the Massachusetts state line. I-91 follows the valley of Miller Run,[a] and there are no convenient services until Barton at exit 25.
The interstate proceeds through Sheffield. Here it reaches the highest point on the road, just north of mile marker 150 on Sheffield Heights, elevation 1,856 feet (566 m).
After leaving the Heights, it enters Orleans County and follows the Barton River valley north with exits in Barton, Orleans, and Derby. Exit 29 is the final U.S. exit on I-91 just after mile marker 177 at Derby Line. Beyond the exit ramp, northbound motorists enter Canada Customs at Stanstead, Quebec and continue into Canada on Autoroute 55 through the Eastern Townships.
As with Connecticut and Massachusetts, US 5 closely parallels Interstate 91 for their entire lengths in Vermont. Indeed, most of the large exit signs on I-91 list US 5 as one of the roads (if not the only road) that can be accessed from the exit, as seen in the exit list below. While paralleling I-91 in Vermont, US 5 is never co-signed onto the freeway, but remains its own two-lane road, except for a portion in White River Junction where it is a 4-lane divided surface arterial.
Traffic and the population of each successive town tend to diminish as the road proceeds northward. Average daily traffic count for 2002 were—Brattleboro (25,600), White River Junction (28,900), St. Johnsbury (10,800), and Derby Line (2,500).
A limited-access highway replacement for U.S. Route 5 was planned at the federal level starting in 1944. A 1953 Massachusetts plan was funded by the Federal Aid Highway Act of 1956, along with spur Interstate 291 (but not Interstate 391). The Vermont section of I-91 was built in stages from 1958 to 1965. In Massachusetts from Bernardston to Northampton, I-91 follows an abandoned right-of-way of the New York, New Haven and Hartford Railroad. To support plans for urban renewal along the "low value" waterfront, the highway crossed the Connecticut River to parallel active NYNHH railroad tracks on the Springfield side of the river, bypassing West Springfield, Massachusetts and Agawam, Massachusetts. Later, this path was perceived as cutting off the city from the river, restricting further commercial development. By 1960, a few miles in Massachusetts were completed, starting from the Connecticut and Vermont state lines. Massachusetts construction was completed from 1964 to 1970.
In the 1970s there were plans to extend I-91 along the Long Island Sound link across from New Haven, Connecticut, to Long Island in New York. The extension would have continued southward to the southern shore of the island perhaps along the route of the current William Floyd Parkway in central Suffolk County. It would also provide easier access to New York City via the Long Island Expressway, as well as to The Hamptons via Sunrise Highway (New York State Route 27). The various proposals for a bridge were dropped after a 1979 study of the concept.
Vermont completed its last sections of I-91 in 1978.
Starting in the 1990s, several rest areas were downgraded in Vermont, increasing distances between facilities. In 2008, Vermont closed the Springfield-Rockingham rest areas because of suspected use by drug abusers. In 2009, the northbound rest area in Hartford was closed, creating a 90-mile (145 km) gap in on-highway facilities. At the present time, there exist 2 intermediate rest areas with facilities in each direction, in addition to a welcome center at each end of the state. Several parking areas remain open.
In 2005, the Massachusetts Highway Department completed a rebuild of on- and off-ramps in Springfield, to reduce accidents caused by weaving near the tightly spaced exits.
In the early 1990s after the Interstate 284 project was canceled, The Exit 44 interchange in East Windsor, Connecticut was altered as it was designed to be part of the freeway. After alters, Exit 44 connected to Route 5 for all traffic to get on and off. As a result, Exit 43 was shut down and closed in that same time frame. Exit 43 was a northbound exit/southbound entrance on State Route 510/Main Street in East Windsor, which was about 2/10ths of a mile away from exit 44.
Route 9 interchange
Impact on Springfield's planned riverfront development
In 2008, Springfield's urban planners contracted UMass Amherst's School of Urban Design to research I-91's effects on Springfield, after receiving complaints from Springfielders about I-91's inhibiting residents' access to Springfield's riverfront, and access to the Basketball Hall of Fame. By 2011, Amherst had produced several dozen critiques denoting that I-91's current route, height, and development beneath and around the highway are inhibiting the development of the city's greatest potential economic and recreational resources, the Connecticut River, the riverfront, and the Basketball Hall of Fame—and also limiting the interaction between these entities and the Metro Center.
During its construction in the 1960s, Interstate 91 sliced through three Springfield neighborhoods: the North End, Metro Center, and the South End. Widely regarded as positive progress at the time, by 2011, Springfield's portion of I-91 was perceived as disrupting the urban fabric of each riverfront neighborhood, while in effect amputating everything east of the highway—the majority of the city—from the Connecticut River, the Connecticut River Walk Park, and the Basketball Hall of Fame. However, Interstate 91 was erected without tunnels, footbridges, and other paths leading to the riverfront, and thus continues to pose logistical problems for people getting to the riverfront, which in turn poses problems for businesses that would like to set up along Springfield's riverfront. The placement of I-91 has left Springfield's riverfront virtually undeveloped aside from the sliver of land surrounding the Basketball Hall of Fame, an international tourist destination, which, under different circumstances, might have more commercial and residential development.
As of 2011, academic and civic studies are still underway. Preliminary findings indicate that I-91's placement negatively impacts tourism in Springfield's Metro Center—the site of many of Springfield's historic, cultural, and entertainment venues. Springfield's most popular tourist attraction, the riverfront Basketball Hall of Fame, is separated from Metro Center by a 20 feet (6.1 m) stone wall, buttressing an elevated portion of the 6-lane Interstate 91, and greatly discouraging travel between the two areas.
Initially, in the 1950s and early 1960s, Interstate 91 was planned to be routed through West Springfield, Massachusetts, down the avenue now known as Riverdale Road—with numerous bridges to be built to accommodate traffic into the City of Springfield. Indeed, Riverdale Road is the original four-lane highway built to accommodate the traffic of Interstate 91. (I-91 has since widened to six lanes.)  In the 1960s, after Springfield learned that its longtime rival, and current business partner in the Knowledge Corridor initiative, the City of Hartford, would use its riverfront to host Interstate 91, Springfield civic leaders petitioned for the I-91 highway to be moved to the east side of the river to cut through the city, rather than employ a series of bridges, as was originally planned. At that time of initial construction, the Connecticut River was polluted and, to many, it seemed that its best days were long behind it. Construction plans were hastily drawn up and executed, and thus construction began on the I-91 highway. On its completion, although its daily usage far surpassed predictions, I-91 never catalyzed significant growth in Springfield, as was the original hope.
Academic suggestions that involve the demolition of the current highway and moving it to a less obtrusive site in the city have been proposed, including the demolition of the highway and following the original path suggested, Riverdale Road, and, least obtrusive but still requiring a great deal of work, a plan to construct numerous walkways beneath the elevated highway to better integrate the neighborhoods with the waterfront despite the highway's presence.
In 2010, the Urban Land Institute made recommendations for how Springfield might reconnect with its riverfront, suggesting the most cost-effective but also the most development-limiting strategy (constructing pathways beneath I-91). No decision has been reached regarding those recommendations.
All interchanges in Massachusetts will be renumbered to milepost-based numbers under a project scheduled to start in 2016.
|Connecticut||New Haven||New Haven||0.00||0.00||—||I-95 / Conn. Turnpike – New York City, New London||Exit 48 on I-95|
|0.23||0.37||1||Route 34 west – Downtown New Haven||Southbound junction only|
|0.64||1.03||2||Hamilton Street||No northbound exit from I-95 north|
|1.30||2.09||4||State Street||Southbound exit only (via Humphrey Street)|
|1.37||2.20||5||US 5 (State Street) – Fair Haven||Northbound exit only|
|1.44||2.32||6||US 5 / Willow Street / Blatchley Avenue||Left exit northbound; US 5 only appears on southbound signage|
|2.15||3.46||7||Ferry Street – Fair Haven||Southbound exit and northbound entrance|
|8||Route 17 (Middletown Avenue) / Route 80 – North Branford|
|9||Montowese Avenue (SR 715)|
|10||Route 40 – Hamden, Cheshire, Mount Carmel||Also serves Quinnipiac University|
|7.56||12.17||11||Route 22 – North Haven||Northbound exit and southbound entrance|
|12||US 5 (Washington Avenue)|
|13||US 5 – Wallingford, North Haven||Via SR 702; left exit northbound|
|12.13||19.52||14||Route 150 (Woodhouse Avenue) – Wallingford||Northbound signage|
|13.40||21.57||Route 150 / East Center Street (SR 738) – Wallingford||Southbound signage|
|15||Route 68 – Yalesville, Durham|
|Meriden||18.71||30.11||16||East Main Street||Southbound exit from Exit 17|
|18.87||30.37||17||Route 15 north (Berlin Turnpike) to I-691 / Route 66||Northbound signage|
|19.74||31.77||Route 15 south (Wilbur Cross Parkway) / East Main Street||Southbound signage|
|19.99||32.17||18||Route 66 east – Middlefield, Middletown||Northbound signage|
|20.27||32.62||I-691 west – Meriden, Waterbury||Southbound signage|
|20.97||33.75||19||Baldwin Avenue / Preston Avenue||Southbound exit and northbound entrance|
|20||Country Club Road / Middle Street|
|21||Route 372 – Cromwell, Berlin|
|22||Route 9 – New Britain, Middletown, Old Saybrook||Signed as Exits 22N (north) and 22S (south); Exist 22S southbound is left exit|
|23||Route 3 – Rocky Hill||Via West Street (SSR 411)|
|24||Route 99 – Wethersfield, Rocky Hill|
|25||Route 3 north – Glastonbury||Northbound signage|
|25N||Route 3 north – Glastonbury||Southbound signage|
|25S||Route 3 south – Wethersfield|
|34.26||55.14||26||Old Wethersfield||Northbound exit is part of Exit 25|
|Hartford||36.53||58.79||27||Brainard Road / Airport Road (SR 530) – Brainard Airport||No northbound entrance|
|35.87||57.73||28||US 5 / Route 15 south (Berlin Turnpike) – Wethersfield, Newington||Left entrance northbound|
|36.82||59.26||29||US 5 / Route 15 north to I-84 east – East Hartford, Boston||Northbound exit and southbound left entrance|
|29A||Capitol Area||Via Whitehead Highway (SR 598); left exit and entrance northbound|
|38.45||61.88||30||I-84 east / Route 2 – East Hartford, New London||Southbound left exit and northbound entrance|
|38.45||61.88||31||State Street||No northbound exit|
|38.81||62.46||32A–B||32A: I-84 west – Waterbury
32B: Trumbull Street
|Left exit northbound; no entrance from Trumbull Street|
|39.55||63.65||Southern end of HOV lanes|
|–||Liebert Road||Southbound left exit only|
|34||Route 159 (Windsor Avenue / North Main Street)|
|35A–B||35A: I-291 east – South Windsor, Manchester, Bissell Bridge
35B: Route 218 – Windsor, Bloomfield
|Exit 2 on I-291|
|—||Route 218 – Windsor||Northbound left exit and southbound left entrance only|
|36||Route 178 (Park Avenue) – Bloomfield|
|37||Route 305 (Bloomfield Avenue) – Windsor Center||HOV: Northbound left exit and southbound left entrance only|
|38||Route 75 / Day Hill Road – Poquonock, Windsor||Signed as Exits 38A (Route 75) and 38B (Day Hill Road) southbound
HOV: Northbound left exit and southbound left entrance only
|47.19||75.94||Northern end of HOV lanes|
|47.22||75.99||39 & 41||Kennedy Road to Center Street||Northbound exit and southbound entrance|
|40||Route 20 – Bradley International Airport|
|Windsor Locks||48.89||78.68||41 & 39||Center Street||Southbound exit only|
|42||To Route 159 – Windsor Locks|
|Connecticut River||49.58||79.79||Dexter Coffin Bridge|
|44||US 5 south – East Windsor|
|45||Route 140 – Warehouse Point, Ellington|
|46||US 5 (King Street)|
|55.34||89.06||47E||Route 190 east – Hazardville, Somers|
|47W||Route 190 west – Suffield|
|48||Route 220 (Elm Street) – Thompsonville|
|49||US 5 (Enfield Street) – Longmeadow, MA|
|Connecticut–Massachusetts state line|
|Massachusetts||Hampden||Springfield||3.836||6.173||1||US 5 south – Forest Park, Longmeadow||Southbound exit and northbound entrance
Southern end of concurrency with US 5
|3.694||5.945||2||Route 83 south – Forest Park, East Longmeadow||No southbound exit|
|4.142||6.666||3||US 5 north to Route 57 (Columbus Avenue) – West Springfield, Agawam||Northern end of concurrency with US 5|
|4.722||7.599||4||Route 83 south (Main Street) – East Longmeadow||Southbound exit only|
|4.568||7.351||5||Broad Street||Northbound exit only|
|5.253||8.454||6||Springfield Center (northbound)
Union Street (southbound)
|Old Exit 5 merged with Exit 6|
|5.989||9.638||7||Hall of Fame Avenue – Downtown Springfield||Southbound exit only|
|6.295||10.131||8||I‑291 / US 20 east to I‑90 / Mass Pike east||I-90 only appears on northbound signage; Exit 1 on I-291|
|6.677||10.746||9||US 20 west / Route 20A east – West Springfield, Westfield||No southbound exit
No southbound entrance from US 20A
|7.172||11.542||10||Main Street – Chicopee, North Springfield||Northbound exit and entrance only|
|7.481||12.040||11||US 20 west (Birnie Avenue) – West Springfield||Southbound exit and entrance only|
|Chicopee||8.289||13.340||12||I‑391 north – Chicopee, Holyoke||Exit 1 on I-391|
|Chicopee–West Springfield||8.643||13.910||Connecticut River|
|West Springfield||9.177||14.769||13A||US 5 north (Riverdale Street)|
|9.184||14.780||13B||US 5 south – West Springfield|
|11.547||18.583||14||I‑90 / Mass Pike – Boston, Albany, NY||Exit 4 on I-90|
|Holyoke||12.396||19.949||15||Lower Westfield Road – Ingleside|
|14.218||22.882||16||US 202 – Holyoke, South Hadley, Westfield|
|15.188||24.443||17||Route 141 – Holyoke, Easthampton||Signed as Exit 17A (east) and Exit 17B (west) northbound|
|Hampshire||Northampton||22.816||36.719||18||US 5 – Northampton, Easthampton|
|24.760||39.847||19||Route 9 – Northampton, Amherst||Northbound exit and southbound entrance|
|26.016||41.869||20||US 5 / Route 9 / Route 10 – Northampton, Hadley||Southbound exit and northbound entrance|
|27.277||43.898||21||US 5 / Route 10 – Hatfield, Whately|
|Hatfield||29.938||48.181||22||US 5 / Route 10 – North Hatfield, Whately||Northbound exit and southbound entrance|
|Franklin||Whately||32.309||51.996||23||US 5 / Route 10 – Whately, North Hatfield||Southbound exit and northbound entrance|
|34.709||55.859||24||US 5 / Route 10 – Deerfield, Whately||No northbound entrance|
|Deerfield||35.891||57.761||25||Route 116 – Deerfield, Conway||Southbound exit and northbound entrance|
|Greenfield||43.011||69.219||26||Route 2 west / Route 2A east – Greenfield Center, North Adams||Southern end of concurrency with Route 2|
|45.752||73.631||27||Route 2 east – Boston||Northern end of concurrency with Route 2; left exit southbound|
|Bernardston||50.360||81.047||28||Route 10 – Bernardston, Northfield||Signed as Exit 28A (north) and Exit 28B (south) northbound|
|Massachusetts–Vermont state line|
|Vermont||Windham||Brattleboro||7.480||12.038||1||US 5 to VT 142 – Brattleboro, Guilford||Also serves Vernon and Hinsdale, NH|
|9.095||14.637||2||VT 9 west – Brattleboro, Bennington||Also serves Manchester via VT 30, Marlboro College, and Wilmington|
|11.550||18.588||3||US 5 / VT 9 east – Brattleboro, Keene, NH||Also serves World Learning SIT Graduate Institute|
|Dummerston–Putney||17.952||28.891||4||US 5 – Putney|
|Town of Westminster||28.610||46.043||5||To US 5 / VT 123 / VT 121 – Westminster, Bellows Falls, Walpole, NH|
|Rockingham||35.200||56.649||6||US 5 / VT 103 – Rockingham, Rutland, Bellows Falls||Also serves Chester and Ludlow|
|Windsor||Springfield||41.690||67.094||7||US 5 / VT 11 / VT 106 – Springfield||Also serves Charlestown, NH and the Fort at Number 4|
|Weathersfield||51.370||82.672||8||VT 131 / US 5 / VT 12 – Ascutney, Windsor||Also serves Ludlow and Claremont, NH|
|Hartland||60.450||97.285||9||US 5 / VT 12 – Hartland, Windsor|
|Hartford||69.810||112.348||10||I‑89 – Lebanon Municipal Airport, New Hampshire, Barre, Montpelier||Signed as Exits 10S (south) and 10N (north)|
|70.200||112.976||11||US 5 – White River Junction|
|72.010||115.889||12||To US 5 – Wilder, White River Junction|
|Norwich||74.830||120.427||13||US 5 / VT 10A – Norwich, Hanover, NH||Also serves Montshire Museum of Science|
|Orange||Thetford||84.210||135.523||14||VT 113 to US 5 – Thetford||Also serves Chelsea and Lyme, NH|
|Fairlee||91.540||147.319||15||US 5 – Fairlee, Orford, NH||Also serves Lake Morey and Lake Fairlee|
|Bradford||97.630||157.120||16||VT 25 to US 5 – Bradford, Barre||Also serves Newbury and Piermont|
|Town of Newbury||110.340||177.575||17||US 302 to US 5 – Wells River, Woodsville, NH||Also serves South Ryegate and Groton|
|Caledonia||Barnet||120.450||193.845||18||To US 5 – Barnet, Peacham||Also serves West Barnet, Monroe NH, McIndoe Falls, and East Ryegate|
|Waterford–St. Johnsbury||128.250||206.398||19||I‑93 south – Littleton, NH|
|St. Johnsbury||128.890||207.428||20||US 5 – St. Johnsbury, Passumpsic|
|130.600||210.180||21||US 2 – St. Johnsbury, Montpelier||Also serves Danville and Hardwick|
|132.550||213.319||22||To US 5 – St. Johnsbury|
|Lyndon||137.110||220.657||23||US 5 to VT 114 – Lyndonville, East Burke||Also serves Lyndon State College|
|140.178||225.595||24||VT 122 to US 5 / VT 114 – Sheffield, Burke, Lyndonville||Also serves Caledonia County Airport|
|Orleans||Barton||155.950||250.977||25||VT 16 to US 5 – Barton, Glover||Also serves Hardwick and Crystal Lake|
|Barton–Orleans–Irasburg||161.410||259.764||26||US 5 / VT 58 – Orleans, Irasburg||Also serves Lake Willoughby and Jay|
|Derby||170.060||273.685||27||VT 191 to US 5 / VT 105 – Newport||Also serves Lake Memphremagog|
|172.400||277.451||28||US 5 / VT 105 – Newport, Derby Center||Also serves Seymour Lake and Lake Memphremagog|
|Derby Line–Derby||177.269||285.287||29||To US 5 – Derby Line|
|Derby Line||177.432||285.549||—||A-55 north – Stanstead||Continuation into Quebec|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Miller Run feeds southeast into the Passumpsic River.
- Federal Highway Administration (October 31, 2002). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of October 31, 2002". Route Log and Finder List. Federal Highway Administration. Retrieved March 28, 2007.
- Google (June 8, 2009). "New Haven, CT" (Map). Google Maps. Google. Retrieved June 8, 2009.
- Massachusetts Department of Transportation Planning Division (2012). "Route Selection Page". Massachusetts Route Log Application. Massachusetts Department of Transportation. I-91 NB. Retrieved August 22, 2014.
- Policy, Planning and Intermodal Development Division Traffic Research Unit (May 2013). 2012 (Route Log) AADTs for State Highways (PDF). Montpelier: Vermont Agency of Transportation. pp. 4–5. Retrieved March 8, 2015.
- Van Diver, Bradford B. (1987). Roadside Geology. Mountain Press Publishing Company.[page needed]
- "Interstate I-91". Interstate Guide. Retrieved June 2, 2008.[self-published source]
- Anderson, Steve (n.d.). "Interstate 91 Massachusetts: Historic Overview". The Roads of Metro Boston. Retrieved December 17, 2011.[self-published source]
- Madden, Steve. "Spanning the Sound". Newsday. Archived from the original on July 10, 2004. Retrieved September 18, 2015.
- Anderson, Steve (n.d.). "Shorham–New Haven Bridge". NYCRoads.com. Retrieved September 18, 2015.
- Stannard, Charles (May 14, 2002). "The Bridge That Never Was: Cable Flap Brings To Mind Sound-Crossing Controversy". Hartford Courant. Retrieved September 18, 2015.
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- Ahronian, David M.; Ashton, Kelly R.; Bassett, Erin G.; Cohen, Maxwell A.; Czulak, Victor J.; Dunbar, Gregory S.; Farragher, Brendan T.; Gorman, Jonathan L.; Guy, Peter L., II; Iles, Timothy J.; Inthasorn, Piyawut; Johnson, Travis A.; Koch, Jonathan; Kronewitter, Justin J.; Livingston, Zachary B.; Morano, Matthew; Mulvehill, Brian; Murphy, Kevin C.; O'Connell, Sean P.; Stephens, Peter W., Jr.; Tourigny, Christopher; White, Bryce P. & Young, Timothy E. (2009). "Making Connections: Envisioning Springfield's North End". Landscape Architecture & Regional Planning Graduate Research and Creative Activity (University of Massachusetts, Amherst, Department of Landscape Architecture & Regional Planning). Paper 4. Retrieved September 10, 2015.
- Inthasorn, Piyawut (2010). "Landscape Urbanism for the Highway City of Springfield North End". Landscape Architecture & Regional Planning Honors Projects (University of Massachusetts, Amherst, Department of Landscape Architecture & Regional Planning). Paper 1. Retrieved September 10, 2015.
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- Town of Brattleboro, Windham County (June 10, 2015)
- Urban Compact of Brattleboro – West Brattleboro, Windham County (June 16, 2015)
- Town of Dummerston, Windham County (June 10, 2015)
- Town of Putney, Windham County (June 10, 2015)
- Town of Westminster, Windham County (June 22, 2015)
- Town of Rockingham, Windham County (June 18, 2015)
- Town of Springfield, Windsor County (June 18, 2015)
- Town of Weathersfield, Windsor County (June 11, 2015)
- Town of Hartland, Windsor County (June 18, 2015)
- Town of Hartford, Windsor County (June 19, 2015)
- Town of Norwich, Windsor County (June 18, 2015)
- Town of Thetford, Orange County (June 11, 2015)
- Town of Fairlee, Orange County (June 18, 2015)
- Town of Bradford, Orange County (June 11, 2015)
- Town of Newbury, Orange County (June 11, 2015)
- Town of Barnet, Caledonia County (June 19, 2015)
- Town of Waterford, Caledonia County (June 18, 2015)
- Town of St. Johnsbury, Caledonia County (June 18, 2015)
- Town of Lyndon, Caledonia County (June 18, 2015)
- Town of Barton, Orleans County (June 18, 2015)
- Village of Orleans, Orleans County (June 18, 2015)
- Town of Irasburg, Orleans County (June 18, 2015)
- Town of Derby, Orleans County (June 16, 2015)
- Village of Derby Line, Orleans County (June 17, 2015)
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- Massachusetts Department of Transportation (2014). "Exit Numbers and Names: Route I-91 (Longmeadow to Bernardston)". Massachusetts Department of Transportation. Retrieved August 22, 2014.
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