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Interstate 89 (I-89) is an Interstate Highway in the Northeastern United States traveling from Bow, New Hampshire, to the Canadian border at Highgate Springs, Vermont, and Saint-Armand, Quebec. As with all odd-numbered primary interstates, I-89 is signed as a north–south highway. However, it follows a primarily northwest-to-southeast path. The route forms a substantial part of the main connection between the cities of Montreal and Boston. In Quebec the route continues as Quebec Route 133. The eventual completion of Autoroute 35 from Montreal will lead to a non-stop limited access highway route between the two cities, following I-93 south from I-89's terminus. The largest cities directly served by I-89 are Concord, New Hampshire and Burlington, Vermont. I-89 is one of three main Interstate highways whose route is located entirely within New England, along with I-91 and I-93 (both of which have their northernmost pavement in Vermont).

Interstate 89 marker

Interstate 89
I-89 highlighted in red
Route information
Length 191.12 mi[1] (307.58 km)
Major junctions
South end I‑93 / NH 3A / Everett Turnpike in Bow, NH
North end Route 133 to A-35 at Canadian border near Highgate Springs, VT
States New Hampshire, Vermont
Highway system

State highways in Vermont
NH 88 NH I‑93
VT 78 VT I-91

I-89 connects smaller cities and rural areas within New Hampshire and Vermont, and maintains two lanes of traffic in each direction throughout the route. Unlike its neighboring Interstates, it does not intersect any even-numbered Interstates along its route. It does, however, parallel (and intersect multiple times with) portions of three U.S. routes: U.S. Route 4 (US 4) from Enfield to White River Junction; US 2 from Montpelier to Colchester, and US 7 from Burlington to the Canadian border.

In the Champlain Valley county of Chittenden, the Champlain Parkway begins from exit 13 in South Burlington and is a proposed link to downtown Burlington.[2] I-189 ("the Parkway") in the county is the only auxiliary route that has a direct exit from I-89.


Route descriptionEdit

  mi km
NH[3] 60.864 97.951
VT[4] 130.254 209.623
Total 191.118 307.575

New HampshireEdit

New Hampshire Exit 15 (Montcalm), looking south

Interstate 89 runs for about 60.6 miles (97.5 km) in the state of New Hampshire, and is the major freeway corridor through the western part of the state. Despite being signed as a north–south freeway, its first 8 miles (13 km) actually run east–west before shifting to the northwest. The two major population centers along I-89's length in New Hampshire are Concord, at its southern terminus, and Lebanon, on the Vermont state line. Mileage signs along I-89 in each direction consistently list one of the two cities. Also located along I-89 in New Hampshire are the towns of Grantham, New London and Warner.

Starting at an intersection with Interstate 93 and New Hampshire Route 3A in the town of Bow, just south of the New Hampshire capital city of Concord, the highway runs a northwest path through the Dartmouth-Lake Sunapee Region. One exit directly serves Concord (Exit 2) before the highway enters the neighboring town of Hopkinton. east–west New Hampshire Route 11 joins I-89 at Exit 11 and runs concurrently with it for about 3 miles (4.8 km) before departing at Exit 12. At Exit 13 in Grantham, New Hampshire Route 10 enters I-89, and the pair of highways form another concurrency, this one for about 15 miles (24 km).

Southeast of Lebanon, signs for Exit 15 display the name "Montcalm", while Exit 16 directs travelers to "Purmort". Neither place name existed at the time of construction of the interstate. Exits 15 and 16 were built to access portions of the town of Enfield that were otherwise cut off by the new highway. The names were chosen by Enfield's selectmen in 1960; the Purmorts were a prominent local family in the early history of Enfield, and Montcalm was a nearby settlement which had once had its own school and post office.[5] While the Purmort exit does allow access to state road network (specifically to US 4 via Eastman Hill Road), the Montcalm exit provides access to a completely isolated community; every possible public road from the exit is a dead end and leaving the Montcalm area requires getting back on I-89 at Exit 15.

The highway continues northwest, passing through Lebanon, in which the Dartmouth-Hitchcock Medical Center is located. A few miles north of this point is Dartmouth College. U.S. Route 4 parallels I-89 through Lebanon. Exits 17 through 20 serve the city of Lebanon and are passed in quick succession. At Exit 19, northbound New Hampshire Route 10 separates from I-89 and joins westbound U.S. Route 4 to pass through West Lebanon. The final exit in New Hampshire is Exit 20, providing access to West Lebanon's large retail district along New Hampshire Route 12A. Just after this interchange, the highway crosses the Connecticut River and enters Vermont, where it remains for the rest of its run northwest to the Canadian border.


Interstate 89 northbound in Vermont, approaching Exit 2 in Sharon
I-89 over the Winooski bridge in Chittenden County, Vermont
I-89 Exit 17 in Colchester (June 5, 2015), Chittenden County

Interstate 89 is one of Vermont's most important roads, as it is the only Interstate highway to directly serve both Vermont's capital city (Montpelier) and largest city (Burlington). Other important cities and towns located along I-89 are Barre, Waterbury, and St. Albans. Williston, which has become Burlington's big-box retail center (and one of the fastest-growing towns in the state) over the past decade, also has an interchange along I-89.

Crossing the Connecticut River into Vermont, I-89 continues the northwesterly direction it carried in New Hampshire. The Interstate intersects I-91 at an unnumbered interchange immediately upon entering Vermont. Shortly afterward, another interchange with U.S. 4 occurs. The highway begins to enter the scenic rolling hills of Vermont, turning almost due northward about 20 miles (32 kilometres) from the New Hampshire state line, and continues through the high country of central Vermont. The Interstate passes through the towns of Sharon, Royalton, Bethel, Randolph, Brookfield, and Williamstown before reaching the "twin cities" of Barre and Montpelier in the middle of Vermont. The interstate's highest point was said to be in the town of Brookfield, although the sign that made the declaration was taken down in the late 1990s.

Another directional shift, again to the northwest, occurs while passing the interchange for Montpelier. For the next 40 miles (64 km), I-89's path is not so much chosen as it is logical: paralleling the Winooski River and U.S. Route 2, the highway cuts through the section of the Appalachians known as the Green Mountains, and is surrounded by peaks of over 4,000 feet (1,219 m), such as Camel's Hump. U.S. 2 crosses the Interstate frequently, and has several interchanges with it, en route to Burlington.

Interstate 89 was unique due to one instance of its signage. Between (Vermont) Exits 9 & 10, a sign showing the distance to the next control cities in each direction was completely in metric. While there are many instances of signs being in both miles and kilometers, this was the only case of solely metric in the entire Interstate System.[6] Both signs were replaced in 2010 and show distances in miles only. (Interstate 19 in Arizona used to be the other "only signed in metric" interstate in the U.S., but has been changed over in recent years as the last 2 km have been changed.) Speed limit signs have always been posted in mph.

The Whale Tails along I-89 northbound in South Burlington, just west of Exit 12

After Exit 11 in Richmond, I-89 leaves the Green Mountains to enter the Champlain Valley and a notable shift in the landscape is visible. Here, just outside Burlington, the highway turns northward once again. Also, at this turn is where the only official auxiliary highway starts, Interstate 189. A second highway, Interstate 289, was proposed as a beltway through Burlington's northeastern suburbs in the 1980s; amidst controversy, the highway has only been partially completed as Vermont Route 289, a Super two roadway. It has yet to directly meet its parent.

Passing I-189 at Exit 13, I-89 sees the busiest freeway interchange in the entire state, Exit 14. A full cloverleaf interchange at this exit provides access to downtown Burlington, the University of Vermont, and the retail-heavy Dorset Street, via U.S. 2. Heading north from Burlington, the landscape quickly fades from suburban development into rolling hills more characteristic of northern New England, providing a vista overlooking Lake Champlain. I-89 passes through Milton, Georgia, St. Albans, Swanton, and finally the border town of Highgate Springs. The highway ends at the Canadian border at the Highgate Springs-St. Armand/Philipsburg Border Crossing in Highgate Springs. Its final exit, which northbound motorists can use to reverse direction onto I-89 south without crossing the border, is exit 22—the highest exit number along the route. U.S. Route 7 has its northern terminus at this interchange as well.

Although the divided highway continues about five miles (eight km) into Philipsburg, Quebec as Route 133, this changes back to a two-lane road, until Autoroute 35 starts outside of Saint-Jean-sur-Richelieu and continues to Montreal. The I-89 border crossing is the only instance where an Interstate entering Quebec does not become an Autoroute upon entry. There are plans to extend Autoroute 35 in the next few years, creating a freeway-to-freeway connection.[7]

Exit listEdit

State County Location[3][8] mi[3][4][8] km Exit Destinations Notes
New Hampshire Merrimack Bow 0.000 0.000   NH 3A – Bow Jct.
    I‑93 to I‑393 / US 4 – Concord, Seacoast, Manchester
Southern terminus
At-grade intersection with NH 3A
0.223 0.359 1 Logging Hill Road – Bow Signed for local traffic only
Concord 2.127 3.423 2   NH 13 (Clinton Street) – Concord
3.848 6.193 3 Stickney Hill Road Northbound exit and southbound entrance
Hopkinton 6.594 10.612 4     US 202 / NH 9 to NH 103 – Hopkinton Northbound exit and southbound entrance
8.533 13.733 5    US 202 / NH 9 – Henniker, Keene, Hopkinton Northbound exit serves US 202 / NH 9 west only. Left exit northbound
10.207 16.427 6   NH 127 – Contoocook, West Hopkinton
Warner 14.187 22.832 7   NH 103 – Davisville, Contoocook To NH 127
16.788 27.018 8   NH 103 – Warner Northbound exit and southbound entrance
19.930 32.074 9   NH 103 – Warner, Bradford
Sutton 26.871 43.245 10 North Road To NH 114
New London 30.918 49.758 11   NH 11 east (King Hill Road) – New London Southern terminus of concurrency with NH 11
34.593 55.672 12    NH 11 west to NH 103A – New London, Sunapee Northern terminus of concurrency with NH 11
Sullivan Sunapee 37.023 59.583 12A   To NH 114 – Georges Mills, Springfield To NH 11
Grantham 43.040 69.266 13   NH 10 south – Grantham, Croydon Southern terminus of concurrency with NH 10
48.020 77.281 14 North Grantham (via Old Route 10) Southbound exit and northbound entrance
Grafton Enfield 50.376 81.072 15 Smith Pond Road / Old Route 10
51.799 83.362 16 Eastman Hill Road – Purmort To Whaleback Ski Area
Lebanon 54.128 87.111 17    US 4 to NH 4A – Enfield, Canaan Former eastern terminus of Bus I-89
56.018 90.152 18   NH 120 – Lebanon, Hanover Also serves Dartmouth College and Dartmouth-Hitchcock Medical Center
58.300 93.825 19    US 4 / NH 10 north – Lebanon, West Lebanon Northern terminus of concurrency with NH 10; Former western terminus of Bus I-89
60.331 97.093 20   NH 12A – West Lebanon, Claremont Also serves Plainfield and Lebanon Municipal Airport
Connecticut River 60.864
Vietnam Veterans Memorial Bridge
Vermont Windsor Hartford 0.570 0.917   I-91 – White River Junction, Brattleboro Exit 10 on I-91
Quechee 3.930 6.325 1   US 4 – Woodstock, Rutland Also serves Quechee and Killington
Sharon 13.420 21.597 2    VT 132 to VT 14 – Sharon, South Royalton
Royalton 22.120 35.599 3     VT 107 to VT 14 / VT 100 – Bethel, Royalton Also serves Joseph Smith birthplace, Rutland, and Vermont Law School
Orange Randolph 30.900 49.729 4    VT 66 to VT 12 – Randolph
Williamstown 42.950 69.121 5     VT 64 to VT 12 / VT 14 – Northfield, Williamstown Also serves Brookfield and Norwich University
Washington Berlin 46.920 75.510 6    VT 63 east to VT 14 – South Barre, Barre Western terminus of VT 63
50.290 80.934 7    VT 62 east to US 302 – Berlin, Barre Western terminus of VT 62; also serves Edward F. Knapp State Airport
Montpelier 52.940 85.199 8    US 2 to VT 12 – Montpelier, St. Johnsbury
Middlesex 58.720 94.501 9    US 2 to VT 100B – Middlesex, Moretown Also serves Waitsfield, Warren, and Mad River Byway
Waterbury 63.760 102.612 10    VT 100 to US 2 – Waterbury, Stowe Also serves Bolton, Waitsfield, and Warren
Chittenden Richmond 78.410 126.189 11    US 2 to VT 117 – Richmond, Williston, Bolton
Williston 83.960 135.121 12     VT 2A to US 2 / VT 116 – Williston, Essex Junction Also serves Hinesburg and Bristol
South Burlington 87.490 140.802 13    I-189 west to US 7 – Burlington, Shelburne, Rutland Eastern terminus of I-189; also serves Vergennes and Middlebury
88.730 142.797 14   US 2 – South Burlington, Burlington Signed as Exits 14E (east) and 14W (west); Exit 14E also serves Burlington International Airport and Exit 14W also serves University of Vermont
Winooski 90.480 145.613 15   VT 15 – Winooski, Essex Junction Northbound exit and southbound entrance; also serves Saint Michael's College and Community College of Vermont
Colchester 91.490 147.239 16     US 2 / US 7 to VT 15 – Winooski, Colchester Also serves Malletts Bay, Albany College of Pharmacy and Health Sciences, and Essex Junction
97.870 157.506 17    US 2 / US 7 – Lake Champlain Islands, Milton, Colchester Also serves New York State via ferry or bridge
Franklin Georgia 106.550 171.476 18    US 7 / VT 104A – Georgia Center, Fairfax, Milton
Town of St. Albans 113.750 183.063 19     US 7 / VT 36 / VT 104 – St. Albans Also serves VT 105 to Enosburg and Richford
117.630 189.307 20    US 7 / VT 207 – St. Albans
Town of Swanton 123.370 198.545 21    VT 78 / US 7 – Swanton Also serves Highgate Center and New York State
Highgate 129.830 208.941 22   US 7 south – Highgate Springs Northern terminus of US 7; last exit in the United States
130.254 209.623    Route 133 north to A-35 – Bedford, Montreal Continuation into Quebec, Canada; future connection with A-35
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Auxiliary routesEdit


  1. ^ "Interstate System: Table 1". Route Log and Finder List. Federal Highway Administration. Retrieved April 12, 2008. 
  2. ^ "Project Overview". CHA Companies. 2010. Retrieved March 11, 2016. 
  3. ^ a b c Bureau of Planning & Community Assistance (February 20, 2015). "NH Public Roads". Concord, New Hampshire: New Hampshire Department of Transportation. Retrieved April 7, 2015. 
  4. ^ a b Traffic Research Unit (May 2013). "2012 (Route Log) AADTs for State Highways" (PDF). Policy, Planning and Intermodal Development Division, Vermont Agency of Transportation. Retrieved March 7, 2015. 
  5. ^ Janice Aitkin, "The towns that can't be found: Exits say Purmort and Montcalm -- but where are they?", The Nashua Telegraph, 5/22/82 p. 2
  6. ^ "I-89". Vermont Roads. Steve Alpert's Miscellanea. Retrieved September 12, 2006. 
  7. ^ [1]
  8. ^ a b Bureau of Planning & Community Assistance (April 3, 2015). "Nodal Reference 2015, State of New Hampshire". New Hampshire Department of Transportation. Retrieved April 7, 2015. 

External linksEdit

Route map: Google

KML is from Wikidata