View source for Interstate 89

{{Short description|Interstate in Vermont and New Hampshire}}
{{More citations needed|date=December 2019}}
{{Use mdy dates|date=September 2019}}
{{Use American English|date=September 2022}}
{{Infobox road
| country = USA
| type = I
| route = 89
| map = {{MapframeForObjects|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=290|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Interstate 89}}}}
| map_custom = yes
| map_notes = I-89 highlighted in red
| length_mi = 191.12
| length_ref = <ref name="fhwa">{{cite web |last=Starks |first=Edward |date=January 27, 2022 |title=Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways |url=https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |access-date=September 8, 2022 |work=FHWA Route Log and Finder List |publisher=[[Federal Highway Administration]]}}</ref>
| established = 1967
| direction_a = South
| terminus_a = {{jct|state=NH|I|93|Turnpike|Everett|NH|3A}} in [[Bow, New Hampshire|Bow, NH]]
| junction = {{plainlist|<!-- Major junctions only; Only 5-8 most major intersections and cities belong here; please read [[WP:USRD/STDS]] for more info -->
* {{jct|state=VT|I|91}} in [[White River Junction, Vermont|White River Junction, VT]]
* {{jct|state=VT|I|189}} in [[South Burlington, Vermont|South Burlington, VT]]
}}
| direction_b = North
| terminus_b = {{jct|province=QC|QC|133}} at the [[Canada–United States border|Canadian border]] near [[Highgate Springs, Vermont|Highgate Springs, VT]]
| states = [[New Hampshire]], [[Vermont]]
| counties = '''NH:''' [[Merrimack County, New Hampshire|Merrimack]], [[Sullivan County, New Hampshire|Sullivan]], [[Grafton County, New Hampshire|Grafton]]<br />'''VT:''' [[Windsor County, Vermont|Windsor]], [[Orange County, Vermont|Orange]], [[Washington County, Vermont|Washington]], [[Chittenden County, Vermont|Chittenden]], [[Franklin County, Vermont|Franklin]]
| system1 = {{infobox road/browselinks/USA|state=NH}}
| system2 = {{infobox road/browselinks/USA|state=VT}}
| browse = {{nh browse|previous_type=NH|previous_route=88|route=NH|next_type=I|next_route=93}}{{vt browse|previous_type=VT|previous_route=78|route=VT|next_type=I|next_route=91}}
}}

'''Interstate&nbsp;89''' ('''I-89''') is an [[Interstate Highway]] in the [[New England]] region of the [[United States]] traveling from [[Bow, New Hampshire]], to the [[Canada–United States border]] between [[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 major part of the main connection between the cities of [[Montreal]] and [[Boston]]. In [[Quebec]], the route continues as [[Quebec Route 133|Route 133]]. The eventual completion of [[Autoroute 35]] will lead to a nonstop [[Limited-access road|limited-access highway]] route between Boston and Montreal, following [[Interstate 93|I-93]] south from I-89's terminus. The largest cities directly served by I-89 are [[Concord, New Hampshire|Concord]], the state capital of [[New Hampshire]]; [[Montpelier, Vermont|Montpelier]], the state capital of [[Vermont]]; and [[Burlington, Vermont]]. I-89 is one of three main Interstate highways whose route is located entirely within New England, along with [[Interstate 91|I-91]] and I-93 (both of which also have their northernmost pavement in Vermont).

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 US Routes: [[U.S. Route 4|US Route 4]] (US 4) from [[Enfield, New Hampshire]], to [[Hartford, Vermont]]; [[U.S. Route 2|US 2]] from [[Montpelier, Vermont|Montpelier]] to [[Colchester, Vermont]]; and [[U.S. Route 7|US 7]] from [[Burlington, Vermont|Burlington]] to the Canadian border. US 7 and US 2 overlap each other between Burlington and Colchester.

In [[Chittenden County, Vermont]], [[Interstate 189|I-189]] begins at exit 13 in [[South Burlington, Vermont|South Burlington]]. The Champlain Parkway, which will be one travel lane in each direction and have at-grade crossings, is being constructed between the current terminus of I-189 at US 7 and Burlington's South End as a link toward downtown Burlington.<ref>{{cite web |url=http://www.champlainparkway.org |publisher=CHA Companies |access-date=March 11, 2016 |date=2010 |title=Project Overview}}</ref> I-189 is the only [[List of auxiliary Interstate Highways|auxiliary route]] of I-89.

==Route description==
{{lengths table|length_ref=<ref name="fhwa" />}}
|-
|NH
|{{convert|60.87|mi|km|disp=table}}
|-
|VT
|{{convert|130.25|mi|km|disp=table}}
|-
|Total
|{{convert|191.12|mi|km|disp=table}}
|}

===New Hampshire===
[[File:MontcalmNH.jpg|thumb|300px|right|New Hampshire exit&nbsp;15 ([[Montcalm, New Hampshire|Montcalm]]), looking south]]
I-89 runs for about {{convert|61|mi|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 {{convert|8|mi|km|spell=in}} actually run east–west before shifting to the northwest. The two major population centers along I-89's length in New Hampshire are [[Concord, New Hampshire|Concord]], at its southern terminus, and [[Lebanon, New Hampshire|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 Hampshire|Grantham]], [[New London, New Hampshire|New London]], and [[Warner, New Hampshire|Warner]].

Starting at an interchange with [[Interstate 93|I-93]] and [[New Hampshire Route 3A]] (NH 3A) in the town of [[Bow, New Hampshire|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, New Hampshire|Hopkinton]]. East–west [[New Hampshire Route 11|NH 11]] joins I-89 at exit 11 and runs concurrently with it for about {{convert|3|mi|km|spell=in}} before departing at exit 12. At exit 13 in Grantham, [[New Hampshire Route 10|NH 10]] enters I-89, and the pair of highways form another concurrency, this one for about {{convert|15|mi|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, New Hampshire|Enfield]] that were otherwise cut off by the new highway. The names were chosen by Enfield's [[selectpeople]] in 1960; the Purmorts were a prominent local family in the early history of Enfield, and Montcalm was a nearby settlement that had once had its own school and post office.<ref>Janice Aitkin, [https://news.google.com/newspapers?id=wqUrAAAAIBAJ&sjid=0PwFAAAAIBAJ&pg=5358%2C4653065 "The towns that can't be found: Exits say Purmort and Montcalm -- but where are they?"], ''The Nashua Telegraph'', 5/22/82 p. 2</ref> While the Purmort exit does allow access to the state road network (specifically to [[U.S. Route 4|US&nbsp;4]] via Eastman Hill Road), the Montcalm exit provides access to an otherwise isolated community; every public road from the exit is a dead-end, and leaving the Montcalm area by car requires getting back on I-89 at exit&nbsp;15. However, a [[bicycle path]] parallels I-89 between exits&nbsp;14 and 16 along the path of Old Route&nbsp;10, allowing foot or bicycle access to the community.

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]]. US&nbsp;4 parallels I-89 through Lebanon. Exits&nbsp;17 through 20 serve the city of Lebanon and are passed in quick succession. At exit&nbsp;19, northbound [[New Hampshire Route 10|NH&nbsp;10]] separates from I-89 and joins westbound US&nbsp;4 to pass through [[West Lebanon, New Hampshire|West Lebanon]]. The final exit in New Hampshire is exit&nbsp;20, providing access to West Lebanon's large retail district along [[New Hampshire Route 12A|NH&nbsp;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.

===Vermont===
[[Image:I-89 Vermont.jpg|thumb|right|I-89 northbound in Vermont, approaching exit 2 in [[Sharon, Vermont|Sharon]]]]
[[File:I-89 Exit 17.JPG|thumb|right|I-89 exit&nbsp;17 in [[Colchester, Vermont|Colchester]] (June 5, 2015), Chittenden County]]

I-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, Vermont|Montpelier]]) and largest city ([[Burlington, Vermont|Burlington]]). Other important cities and towns located along I-89 are [[Barre (city), Vermont|Barre]], [[Waterbury, Vermont|Waterbury]], and [[St. Albans (town), Vermont|St. Albans]]. [[Williston, Vermont|Williston]], which has become Burlington's [[big-box store|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 [[Interstate 91|I-91]] at a previously unnumbered interchange (now exit 1) immediately upon entering Vermont. Shortly afterward, another interchange with [[U.S. Route 4|US 4]] occurs. The highway begins to enter the scenic rolling hills of Vermont, turning almost due northward about {{convert|20|mi|km}} from the New Hampshire state line, and continues through the high country of central Vermont. The Interstate passes through the towns of [[Sharon, Vermont|Sharon]], [[Royalton, Vermont|Royalton]], [[Bethel, Vermont|Bethel]], [[Randolph, Vermont|Randolph]], [[Brookfield, Vermont|Brookfield]], and [[Williamstown, Vermont|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 {{convert|40|mi|km}}, I-89's path is not so much chosen as it is logical: paralleling the [[Winooski River]] and [[U.S. Route 2|US 2]], the highway cuts through the section of the [[Appalachian Mountains]] known as the [[Green Mountains]], and is surrounded by peaks of over {{convert|4000|ft|m}}: [[Camel's Hump]] to the south and [[Mount Mansfield]] to the north. US 2 crosses the Interstate frequently, and has several interchanges with it, en route to Burlington.

I-89 was unique due to one instance of its signage. Between (Vermont) exits 9 and 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.<ref>{{cite web|work=Steve Alpert's Miscellanea|url=http://www.alpsroads.net/roads/vt/i-89/|department=Vermont Roads |title= I-89|access-date=September 12, 2006}}</ref> Both signs were replaced in 2010 and show distances in miles only. ([[Interstate 19|I-19]] in [[Arizona]] used to be the other "only signed in metric" Interstate in the US, but has been changed over in recent years as the last {{Convert|2|km|mi|sp=us|spell=in}} have been changed.) Speed limit signs have always been posted in miles per hour.

[[Image:ReverenceWhaleTailsSBVT 20140916 (22891703100).jpg|thumb|left|[[Reverence (sculpture)|Reverence]] along I-89 northbound in [[South Burlington, Vermont|South Burlington]], just west of exit&nbsp;12]]
After exit 11 in [[Richmond, Vermont|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, Vermont|Burlington]], the highway turns northward once again. Also, at this turn is where the only ''official'' auxiliary highway starts, [[Interstate 189|I-189]]. A second highway, [[Interstate 289|I-289]], was proposed as a beltway through Burlington's northeastern suburbs in the 1980s; amid controversy, the highway has only been partially completed as [[Vermont Route 289]] (VT 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 US 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, Vermont|Milton]], [[Georgia, Vermont|Georgia]], [[St. Albans (town), Vermont|St. Albans]], [[Swanton (town), Vermont|Swanton]], and finally the border town of Highgate Springs. The highway ends at the Canada–United States border at the [[Highgate Springs–St. Armand/Philipsburg Border Crossing]] in [[Highgate Springs, Vermont|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|US 7]] has its northern terminus at this interchange as well.

The divided highway continues about {{convert|4|mi|km|spell=in}} into [[Philipsburg, Quebec]], as [[Quebec Route 133|Route 133]], then changes to [[Quebec Autoroute 35|Autoroute 35]] and continues to [[Saint-Jean-sur-Richelieu]] and [[Chambly, Quebec|Chambly]] before it meets [[Quebec Autoroute 10|Autoroute 10]], which goes to [[Montreal]].<ref>{{cite web |title=Autoroute 35 - Extension |url=http://www.mtq.gouv.qc.ca/portal/page/portal/grands_projets_en/trouver_grand_projet/parachevement_a35 |publisher=Transports-Quebec |access-date=25 February 2012 |language=fr |url-status=dead |archive-url=https://archive.today/20120804165959/http://www.mtq.gouv.qc.ca/portal/page/portal/grands_projets_en/trouver_grand_projet/parachevement_a35 |archive-date=4 August 2012 }}</ref> The I-89 border crossing is the only instance where an Interstate entering Quebec does not become an [[Autoroutes of Quebec|Autoroute]] upon entry. There were plans to complete the extension of Autoroute 35 from Saint-Sébastien to the border crossing at I-89's northern terminus in 2025, creating a freeway-to-freeway connection,<ref>{{cite web|title=L'autoroute 35 sera complétée d'ici 2023|date=October 9, 2019 |publisher=Agence QMI|access-date=3 June 2020|language=fr |url=https://www.tvanouvelles.ca/2019/10/09/lautoroute-35-sera-completee-dici-2023}}</ref> but the final phase was indefinitely postponed in March 2025.

==History==
[[File:VT 9 I89 FHWA 1965 363.jpg|thumb|right|Construction of the White River Bridge near [[White River Junction, Vermont]] (1965)]]
[[File:VT 4 I89 FHWA 1963 902.jpg|thumb|right| I-89 looking easterly up the Winooski River valley, crossing U.S. Route 2, approximately 2 3/4 miles west of [[Waterbury, Vermont|Waterbury]] (1963)]]
===Construction===
I-89 was commissioned as part of the [[Federal-Aid Highway Act of 1956]], meant to connect [[Norwalk, Connecticut]], to the Canada–United States border via the [[U.S. Route 7|US 7]] corridor, which is the current northern terminus of I-89. Within three years, however, opposition to the project (particularly from [[Massachusetts]], which desired a freeway connection from Boston to Montreal) shifted I-89 to its present alignment that connects [[Boston]] with [[Montreal]]. The first section of the highway was opened between [[Montpelier, Vermont|Montpelier]] and [[Middlesex, Vermont]], in November 1960, and between Middlesex and [[Waterbury, Vermont|Waterbury]] in December 1960. The highway was subsequently opened between Waterbury and [[Bolton, Vermont|Bolton]] in November 1961; between [[South Burlington, Vermont|South Burlington]] and [[Winooski, Vermont|Winooski]] in November 1962; between Winooski and [[Colchester, Vermont|Colchester]] and between [[Richmond, Vermont|Richmond]] and South Burlington in November 1963; between Bolton and Richmond in October 1964; in Colchester in November 1964; and between [[Swanton (town), Vermont|Swanton]] and [[Highgate, Vermont|Highgate]] in 1965. The Interstate was opened in most parts of New Hampshire in 1967, and the entirety of the route was opened in 1982.<ref>{{cite web|url=https://www.interstate-guide.com/i-089.html|agency=Interstate Guide|title=Interstate 89|access-date=December 3, 2018}}</ref>

===Original proposal===
I-89 was originally supposed to be a directly north–south route from [[Interstate 95 in Connecticut|I-95]] in [[Norwalk, Connecticut]], to its current northern terminus at the Canada–United States border. The route shifted after opposition came from residents and local lawmakers in interior [[New England]] who did not want an Interstate running through their countryside and towns. One major problem that was a big part in sinking the project was that the highway would have to go through the [[Green Mountain National Forest]] in Vermont.<ref>{{cite web |url=https://www.fs.usda.gov/wps/portal/fsinternet/cs/main/!ut/p/z1/04_Sj9CPykssy0xPLMnMz0vMAfIjo8zijQwgwNHCwN_DI8zPwBcqYKAfDlZggAM4GuhHEaMfj4Io_MaH60dhtSLMB2ECITO89KPSc_KTIN51zEsytkjXjypKTUstSi3SKy0CCmeUlBQUW6kaqBqUl5frpefnp-ek6iXn56oaYNOSkV9coh-BqlK_IDc0wiDLNKfMx1ERAMzc-30!/dz/d5/L2dBISEvZ0FBIS9nQSEh/?pname=Green%20Mountain-%20Home&navtype=BROWSEBYSUBJECT&ss=110920&pnavid=null&navid=091000000000000&cid=FSE_003853|archive-url=https://web.archive.org/web/20171214094327/https://www.fs.usda.gov/wps/portal/fsinternet/cs/main/!ut/p/z1/04_Sj9CPykssy0xPLMnMz0vMAfIjo8zijQwgwNHCwN_DI8zPwBcqYKAfDlZggAM4GuhHEaMfj4Io_MaH60dhtSLMB2ECITO89KPSc_KTIN51zEsytkjXjypKTUstSi3SKy0CCmeUlBQUW6kaqBqUl5frpefnp-ek6iXn56oaYNOSkV9coh-BqlK_IDc0wiDLNKfMx1ERAMzc-30!/dz/d5/L2dBISEvZ0FBIS9nQSEh/?pname=Green%20Mountain-%20Home&navtype=BROWSEBYSUBJECT&ss=110920&pnavid=null&navid=091000000000000&cid=FSE_003853|url-status=dead|archive-date=December 14, 2017|title=Green Mountain National Forest|agency=USDA|access-date=December 3, 2018}}</ref> Parts of the Interstate were built in Connecticut, between Norwalk and [[Wilton, Connecticut|Wilton]] and from [[Brookfield, Connecticut|Brookfield]] to [[Danbury, Connecticut|Danbury]], a short bypass around [[Lenox, Massachusetts]], and in southern Vermont between [[Bennington, Vermont|Bennington]] and [[Manchester, Vermont|Manchester]] and are currently designated as [[U.S. Route 7|US 7]]. The state of Connecticut had plans to extend the Norwalk segment to meet with the Danbury segment but has instead opted to widen portions of the existing road to four lanes.<ref>{{cite web|url=http://www.route7.org/|agency=The Committee To Extend Route 7|title=Save Super Seven|access-date=December 3, 2018|archive-date=December 9, 2018|archive-url=https://web.archive.org/web/20181209031426/http://www.route7.org/|url-status=dead}}</ref> There has always been talk of building the original route of I-89, as it would bring economic development to cities like [[Pittsfield, Massachusetts]], and [[Bennington, Vermont]], and connect parts of the interior Northeast to New York City, but nothing has ever been formally proposed since the original proposal in the 1950s.{{whose quote}}

===Other routes between Boston and Montreal===
The current route of I-89 is the main artery between [[Boston]] and [[Montreal]], two large metropolitan areas in the US and Canada, respectively. Before I-89 was built, there was no limited-access route between the two cities. The route between the two cities is not complete, however, as [[Quebec Autoroute 35|Autoroute 35]] in [[Quebec]] still needs to be extended south of its current terminus to connect to I-89 at the Canada–United States border. In 2019, it was announced that the highway would be complete by 2023,<ref>{{Cite web |title=L'autoroute 35 sera complétée d'ici 2023 |url=https://www.tvanouvelles.ca/2019/10/09/lautoroute-35-sera-completee-dici-2023 |access-date=2022-07-09 |website=TVA Nouvelles|date=October 9, 2019 }}</ref> {{As of|2022|07}}, grading of the right of way between the existing terminus at exit 15 to Chemin Champlain is in progress.

== Future ==
Vermont and New Hampshire are working together to reconstruct the Vietnam Veterans Memorial Bridge over the [[Connecticut River]]. As part of construction, the deck and superstructure of the bridge would be replaced, and [[auxiliary lane]]s would be added to give more merging room for travelers entering and exiting I-89 at the exits for [[Interstate 91|I-91]]. Construction will occur between 2020 and 2022.<ref>{{Cite web |url=https://www.vnews.com/Interstate-89-project-could-have-major-traffic-impacts-26056475 |title=Interstate 89 projects pose commute problems for Lebanon, Hartford |last=Camerato |first=Tim |date=June 5, 2019 |website=Valley News |access-date=September 26, 2019}}</ref><ref>{{Cite web |date=October 2017 |title=I-89 Lebanon, NH–Hartford, VT Bridge Reconstruction & Widening Project |url=https://www.nh.gov/dot/projects/lebhart16148/documents/16148_narrative_101617.pdf |archive-url=https://web.archive.org/web/20190927023102/https://www.nh.gov/dot/projects/lebhart16148/documents/16148_narrative_101617.pdf |archive-date=September 27, 2019 |url-status=live |access-date=September 8, 2022 |publisher=[[New Hampshire Department of Transportation]]}}</ref>{{Update after|2022}}

The [[Vermont Agency of Transportation]] (VTrans) has released plans to build a [[diverging diamond interchange]] along I-89 at exit 16 (milepost exit 91; [[U.S. Route 2 in Vermont|US 2]]/[[U.S. Route 7 in Vermont|US 7]]) in [[Colchester, Vermont|Colchester]], the first interchange of its kind in the state. Construction was expected to start in early 2023 and be completed in late 2025.<ref>{{Cite web |url=https://vermontbiz.com/news/2019/april/09/colchester-exit-16-ddi-project-scheduled-2020 |title=Colchester Exit 16 DDI project scheduled for 2020 |date=April 9, 2019 |website=Vermont Business Magazine |language=en |access-date=September 27, 2019}}</ref><ref>{{Cite web |url=http://www.exit16ddi.vtransprojects.vermont.gov/ |title=Colchester Exit 16 DDI |publisher= Vermont Agency of Transportation |access-date=September 27, 2019}}</ref> However, phase I of construction began earlier than originally planned in winter 2022. Phase I work will relocate utilities, replace waterlines, and remove ledges, along with additional work on retaining walls and drainage. Working on the diverging diamond itself is expected to begin in fall 2024 once bidding and a contract let has been made. However, its completion has now been pushed back to mid-2026.<ref>{{cite news |last1=St. Angelo |first1=Lilly |title=Detours and night work: Road work to expect in Chittenden County this summer |url=https://www.burlingtonfreepress.com/story/news/local/2023/05/01/vermont-road-work-chittenden-county-road-projects-this-summer/70151213007/ |access-date=July 25, 2023 |work=Burlington Free Press |date=May 1, 2023}}</ref><ref>{{cite web |title=Project Overview: Exit 16 Diverging Diamond Interchange |url=https://www.exit16ddi.vtransprojects.vermont.gov/project-overview/ |publisher=Vermont Agency of Transportation |access-date=July 25, 2023}}</ref><!-- The website incorrectly says that construction started in Winter 2023 -->

Starting in early 2024, VTrans is improving the interchange at exit 17 (milepost 97; US 2/US 7) at I-89 and the Chimney Corner intersection of US 2 and US 7 in Colchester, with corresponding roadway improvements and the replacement of the existing bridge carrying US 2 over I-89 within the project limits. In order to address safety concerns of traffic backing up onto I-89 northbound, the intersection of the northbound off-ramp and US 2 will be improved by adding a left turn lane onto US 2 eastbound to increase capacity. The southbound off-ramp will also be reconstructed to make way for a new southbound on-ramp to eliminate the left-turn conflict point for vehicles accessing I-89 southbound from US 2 westbound. In addition, the intersection of US 2 and US 7 will be reconfigured along with the widening of the roadways to accommodate additional turning lanes, all of which are key project elements in reducing queuing and delays. Construction will last for three construction seasons and, as of June 2024, is expected to be completed in mid-2026.<ref>{{Cite web |title=Colchester Exit 17 Project: Colchester NH 028-1(31) |url=https://vtrans.vermont.gov/projects/colchester-exit17 |archive-url=https://web.archive.org/web/20240615000854/https://vtrans.vermont.gov/projects/colchester-exit17 |archive-date=June 15, 2024 |url-status=live |access-date=June 14, 2024 |publisher=Vermont Agency of Transportation}}</ref><ref>{{Cite web |title=Colchester Bridge BR#18A Factsheet |url=https://resources.vtrans.vermont.gov/FactSheet/default.aspx?pin=14T213 |archive-url=https://web.archive.org/web/20240615000856/https://resources.vtrans.vermont.gov/FactSheet/default.aspx?pin=14T213 |archive-date=June 15, 2024 |url-status=live |access-date=June 14, 2024 |publisher=Vermont Agency of Transportation}}</ref>

==Exit list==
New Hampshire uses sequential exit numbering, with the interchange with I-93 in Concord being unnumbered. In 2020, Vermont added "milepoint exit" numbers to existing signs, essentially marking each interchange with two exit numbers (except the I-91 interchange, which was previously unnumbered). However, the [[Gore (road)|gore point]] exit number signs continue to show only the sequential exit numbers.<ref>{{cite web|date=October 22, 2021|title=Vermont Exit Numbering {{!}} Agency of Transportation|url=https://vtrans.vermont.gov/projects/exit-numbering}}</ref>{{jcttop|old|state_col=state|length_ref=<ref name="NHDOT Roads">{{cite web|url=http://www.granit.unh.edu/data/search?dset=roads_dot|title=NH Public Roads|author=Bureau of Planning & Community Assistance|date=February 20, 2015|publisher=[[New Hampshire Department of Transportation]]|place=Concord, New Hampshire|access-date=April 7, 2015}}</ref><ref name="VT Route Log">{{cite web|url=http://vtransplanning.vermont.gov/sites/aot_policy/files/Final%20Web.pdf |archive-url=https://web.archive.org/web/20131221031652/http://vtransplanning.vermont.gov/sites/aot_policy/files/Final%20Web.pdf |archive-date=2013-12-21 |url-status=live|title=2012 (Route Log) AADTs for State Highways|author=Traffic Research Unit|date=May 2013|publisher=Policy, Planning and Intermodal Development Division, Vermont Agency of Transportation|access-date=March 7, 2015}}</ref><ref name="NH Town Maps">{{Cite FTP |url=ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/|title=Nodal Reference 2015, State of New Hampshire|author=Bureau of Planning & Community Assistance|date=April 3, 2015|server=[[New Hampshire Department of Transportation]]|url-status=dead|access-date=April 7, 2015}}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/BOW_Wallmap.pdf Town of Bow, Merrimack County]{{dead link|date=May 2025|bot=medic}}{{cbignore|bot=medic}}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/CONCORD_Wallmap.pdf City of Concord, Merrimack County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/HOPKINTON_Wallmap.pdf Town of Hopkinton, Merrimack County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/WARNER_Wallmap.pdf Town of Warner, Merrimack County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/SUTTON_Wallmap.pdf Town of Sutton, Merrimack County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/NEW%20LONDON_Wallmap.pdf Town of New London, Merrimack County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/SUNAPEE_Wallmap.pdf Town of Sunapee, Sullivan County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/GRANTHAM_Wallmap.pdf Town of Grantham, Sullivan County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/ENFIELD_Wallmap.pdf Town of Enfield, Grafton County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}
*[ftp://dot%2Ecity:streetmap@nhftp.admin.state.nh.us/2015_FULL_SIZE_PDFS/LEBANON_Wallmap.pdf City of Lebanon, Grafton County]{{Dead link|date=November 2025 |bot=InternetArchiveBot }}</ref>|location_ref=<ref name="NHDOT Roads" /><ref name="NH Town Maps" />}}
{{NHint|old
|sspan=23
|county=Merrimack
|cspan=14
|location=Bow
|lspan=3
|mile=0.000
|exit=–
|road={{jct|state=NH|NH|3A|location1=[[Bow, New Hampshire|Bow Junction]]|city2=Concord|city3=Hooksett|areadab3=CDP|city4=Manchester}}
|notes=Southern terminus; [[at-grade intersection]]
}}
{{NHint|old
|mile=
|exit=–
|type=incomplete
|road={{jct|state=NH|I|93|name1=[[Everett Turnpike]]|to2=yes|I|393|dir2=east|US|4|name3={{jct|state=NH|US|202|noshield=yes}}|city1=Concord|city2=Portsmouth|city3=Manchester|location4=[[Boston]]}}
|notes=Southbound exit and northbound entrance
}}
{{NHint|old
|mile=0.223
|exit=1
|road=Logging Hill Road&nbsp;– [[Bow, New Hampshire|Bow]]
|notes=
}}
{{NHint|old
|location=Concord
|lspan=2
|mile=2.127
|exit=2
|road={{jct|state=NH|NH|13|name1=Clinton Street|city1=Concord}}
}}
{{NHint|old
|mile=3.848
|exit=3
|type=incomplete
|road=Stickney Hill Road
|notes=Northbound exit and southbound entrance
}}
{{NHint|old
|location=Hopkinton
|lspan=3
|mile=6.594
|exit=4
|type=incomplete
|road={{jct|state=NH|US|202|NH|9|to3=yes|NH|103|city1=Hopkinton}}
|notes=Northbound exit and southbound entrance
}}
{{NHint|old
|mile=8.533
|exit=5
|type=incomplete
|road={{jct|state=NH|US|202|NH|9|city1=Henniker|city2=Keene|city3=Hopkinton}}
|notes=No southbound access to US&nbsp;202 east/NH&nbsp;9 east
}}
{{NHint|old
|mile=10.207
|exit=6
|road={{jct|state=NH|NH|127|city1=Contoocook|city2=West Hopkinton}}
}}
{{NHint|old
|location=Warner
|lspan=3
|mile=14.187
|exit=7
|road={{jct|state=NH|NH|103|city1=Davisville|city2=Contoocook}}
}}
{{NHint|old
|mile=16.788
|exit=8
|type=incomplete
|road={{jct|state=NH|NH|103|city1=Warner|areadab1=CDP}}
|notes=Northbound exit and southbound entrance
}}
{{NHint|old
|mile=19.930
|exit=9
|road={{jct|state=NH|NH|103|city1=Warner|areadab1=CDP|city2=Bradford|areadab2=CDP}}
|notes=Also serves [[Newport, New Hampshire|Newport]] and [[Claremont, New Hampshire|Claremont]]
}}
{{NHint|old
|location=Sutton
|mile=26.871
|exit=10
|road={{jct|state=NH|road|North Road|to2=yes|NH|114|city1=Sutton}}
|notes=Access to NH 114 via Gile Pond Road
}}
{{NHint|old
|location=New London
|lspan=2
|mile=30.918
|exit=11
|type=concur
|road={{jct|state=NH|NH|11|dir1=east|name1=King Hill Road|city1=New London}}
|notes=Southern end of NH 11 concurrency
}}
{{NHint|old
|mile=34.593
|exit=12
|type=concur
|road={{jct|state=NH|NH|11|NH|103A|dir1=west|to2=yes|city1=New London|areadab1=CDP|city2=Sunapee}}
|notes=Northern end of NH 11 concurrency
}}
{{NHint|old
|county=Sullivan
|cspan=3
|location=Sunapee
|mile=37.023
|exit=12A
|road={{jct|state=NH|to1=yes|NH|114|city1=Georges Mills|city2=Springfield}}
|notes=Access via Georges Mill Road; to [[New Hampshire Route 11|NH&nbsp;11]]
}}
{{NHint|old
|location=Grantham
|lspan=2
|mile=43.040
|exit=13
|type=concur
|road={{jct|state=NH|NH|10|dir1=south|city1=Grantham|city2=Croydon}}
|notes=Southern end of NH 10 concurrency
}}
{{NHint|old
|mile=48.020
|exit=14
|type=incomplete
|road=[[Grantham, New Hampshire|North Grantham]]
|notes=Southbound exit and northbound entrance; access via Old Route 10
}}
{{NHint|old
|county=Grafton
|cspan=6
|location=Enfield
|lspan=2
|mile=50.376
|exit=15
|road=Smith Pond Road&nbsp;/ Old Route 10&nbsp;– [[Montcalm, New Hampshire|Montcalm]]
}}
{{NHint|old
|mile=51.799
|exit=16
|road=Methodist Hill Road&nbsp;/ Eastman Hill Road&nbsp;– [[Purmort, New Hampshire|Purmort]]
|notes=To [[Whaleback (ski area)|Whaleback Mountain Road]]
}}
{{NHint|old
|location=Lebanon
|lspan=4
|mile=54.128
|exit=17
|road={{jct|state=NH|US|4|to2=yes|NH|4A|city1=Enfield|areadab1=CDP|city2=Canaan|areadab2=CDP}}
|notes=Former I-89 Bus.; also serves [[Enfield Shaker Museum]] and [[Mascoma Lake]]
}}
{{NHint|old
|mile=56.018
|exit=18
|road={{jct|state=NH|NH|120|city1=Lebanon|city2=Hanover|areadab2=CDP}}
|notes=Also serves [[Dartmouth College]] and [[Dartmouth-Hitchcock Medical Center]]}}
{{NHint|old
|mile=58.300
|exit=19
|type=concur
|road={{jct|state=NH|US|4|NH|10|dir2=north|city1=West Lebanon|city2=Hanover|areadab2=CDP}}
|notes=Northern end of NH&nbsp;10 concurrency; former I-89 Bus.}}
{{NHint|old
|mile=60.331
|exit=20
|road={{jct|state=NH|NH|12A|city1=West Lebanon|city2=Claremont}}
|notes=Also serves [[Plainfield, New Hampshire|Plainfield]] and [[Lebanon Municipal Airport (New Hampshire)|Lebanon Municipal Airport]]}}
{{jctbridge|old
|river=[[Connecticut River]]
|river_wide=yes
|mile=60.864
|mile2=0.000
|line=yes
|bridge=Vietnam Veterans Memorial Bridge
}}
{{VTint|old
|sspan=24
|county=Windsor
|cspan=4
|location=Hartford
|mile=0.570
|old=-
|exit=1
|road={{jct|state=VT|I|91|city1=White River Junction|city2=Brattleboro}}
|notes=Signed as exits 1A (north) and 1B (south) northbound; exits 10A-B (69A-B) on I-91
}}
{{VTint|old
|location=Quechee
|mile=3.930
|old=1
|exit=3
|road={{jct|state=VT|US|4|city1=Woodstock|areadab1=village|city2=Rutland|areadab2=city}}
|notes=Rutland not signed southbound; also serves [[Quechee, Vermont|Quechee]] and [[Killington, Vermont|Killington]]
}}
{{VTint|old
|location=Sharon
|mile=13.420
|old=2
|exit=13
|road={{jct|state=VT|VT|132|VT|14|to2=yes|city1=Sharon|city2=South Royalton}}
}}
{{VTint|old
|location=Royalton
|mile=22.120
|old=3
|exit=22
|road={{jct|state=VT|VT|107|to2=to|VT|14|VT|100|city1=Bethel|areadab1=CDP|city2=Royalton}}
|notes=Also serves [[Joseph Smith]] birthplace, [[Rutland (city), Vermont|Rutland]], and [[Vermont Law School]]
}}
{{VTint|old
|county=Orange
|cspan=2
|location=Randolph
|mile=30.900
|old=4
|exit=30
|road={{jct|state=VT|VT|66|VT|12|to2=yes|city1=Randolph|areadab1=CDP}}
}}
{{VTint|old
|location=Williamstown
|mile=42.950
|old=5
|exit=42
|road={{jct|state=VT|VT|64|VT|12|VT|14|to2=yes|city1=Northfield|areadab1=CDP|city2=Williamstown|areadab2=CDP}}
|notes=Also serves [[Brookfield, Vermont|Brookfield]] and [[Norwich University]]
}}
{{VTint|old
|county=Washington
|cspan=5
|location=Berlin
|lspan=2
|mile=46.920
|old=6
|exit=47
|road={{jct|state=VT|VT|63|dir1=east|VT|14|to2=yes|city1=South Barre|city2=Barre|areadab2=city}}
|notes=Western terminus of VT&nbsp;63
}}
{{VTint|old
|mile=50.290
|old=7
|exit=50
|road={{jct|state=VT|VT|62|dir1=east|US|302|to2=yes|city1=Berlin|city2=Barre|areadab2=city}}
|notes=Western terminus of VT&nbsp;62; also serves [[Edward F. Knapp State Airport]]
}}
{{VTint|old
|location=Montpelier
|mile=52.940
|old=8
|exit=52
|road={{jct|state=VT|US|2|VT|12|to2=yes|city1=Montpelier|city2=St. Johnsbury}}
|notes=VT 12/St. Johnsbury not signed northbound}}
{{VTint|old
|location=Middlesex
|mile=58.720
|old=9
|exit=58
|road={{jct|state=VT|US|2|VT|100B|to2=yes|city1=Middlesex|city2=Moretown}}
|notes=Also serves [[Waitsfield, Vermont|Waitsfield]], [[Warren, Vermont|Warren]], and [[Mad River Byway]]
}}
{{VTint|old
|location=Waterbury
|mile=63.760
|old=10
|exit=63
|road={{jct|state=VT|VT|100|US|2|to2=yes|city1=Waterbury|areadab1=CDP|city2=Stowe|areadab2=CDP}}
|notes=Also serves [[Waitsfield, Vermont|Waitsfield]] and [[Warren, Vermont|Warren]]
}}
{{VTint|old
|county=Chittenden
|cspan=7
|location=Richmond
|mile=78.410
|old=11
|exit=78
|road={{jct|state=VT|US|2|VT|117|to2=yes|city1=Richmond|areadab1=CDP|city2=Williston|city3=Bolton}}
}}
{{VTint|old
|location=Williston
|mile=83.960
|old=12
|exit=83
|road={{jct|state=VT|VT|2A|US|2|VT|116|to2=yes|city1=Williston|city2=Essex Junction}}
|notes=Also serves [[Burlington International Airport]], [[Vermont Technical College]], [[Hinesburg, Vermont|Hinesburg]] and [[Bristol, Vermont|Bristol]]
}}
{{VTint|old
|location=South Burlington
|lspan=2
|mile=87.490
|old=13
|exit=87
|road={{jct|state=VT|I|189|dir1=west|US|7|to2=yes|city1=Burlington|city2=Shelburne|city3=Rutland|areadab3=city}}
|notes=Eastern terminus of I-189; also serves [[Vergennes, Vermont|Vergennes]] and [[Middlebury, Vermont|Middlebury]]
}}
{{VTint|old
|mile=88.730
|old=14
|exit=88
|road={{jct|state=VT|US|2|city1=South Burlington|city2=Burlington}}
|notes=Signed as exits 14E (88A) (east) and 14W (88B) (west); serves [[Burlington International Airport]], [[University of Vermont]], and [[Champlain College]]
}}
{{VTint|old
|location=Winooski
|mile=90.480
|old=15
|exit=90
|type=incomplete
|road={{jct|state=VT|VT|15|city1=Winooski|city2=Essex Junction}}
|notes=Northbound exit and southbound entrance; serves [[Saint Michael's College]], [[Community College of Vermont]]
}}
{{VTint|old
|location=Colchester
|lspan=2
|mile=91.490
|old=16
|exit=91
|road={{jct|state=VT|US|2|US|7|VT|15|to3=yes|city1=Winooski|city2=Colchester}}
|notes=VT 15 not signed northbound; interchange currently under construction to become [[diverging diamond interchange]]<ref>{{cite web |author1=VTrans |title=Exit 16 Diverging Diamond Interchange |url=https://www.exit16ddi.vtransprojects.vermont.gov/ |access-date=1 June 2023}}</ref>
}}
{{VTint|old
|mile=97.870
|old=17
|exit=97
|road={{jct|state=VT|US|2|US|7|city1=Lake Champlain Islands|city2=Milton|areadab2=CDP|city3=Colchester}}
|notes=Also serves [[New York (state)|New York State]] via ferry or bridge
}}
{{VTint|old
|county=Franklin
|cspan=6
|location=Georgia
|mile=106.550
|old=18
|exit=106
|road={{jct|state=VT|US|7|VT|104A|city1=Georgia Center|city2=Fairfax|areadab2=CDP|city3=Milton|areadab3=CDP}}
}}
{{VTint|old
|location=St. Albans
|area=town
|lspan=2
|mile=113.750
|old=19
|exit=113
|road={{jct|state=VT|road|St. Albans State Highway|US|7|VT|36|VT|104|city1=St. Albans|areadab1=city|to2=yes}}
|notes=Also serves [[Vermont Route 105|VT 105]] to [[Enosburg, Vermont|Enosburg]] and [[Richford, Vermont|Richford]]
}}
{{VTint|old
|mile=117.630
|old=20
|exit=117
|road={{jct|state=VT|US|7|VT|207|city1=St. Albans|areadab1=city}}
}}
{{VTint|old
|location=Swanton
|area=town
|mile=123.370
|old=21
|exit=123
|road={{jct|state=VT|VT|78|US|7|to2=yes|city1=Swanton|areadab1=town}}
|notes=Also serves [[Highgate Center, Vermont|Highgate Center]] and [[New York State]]
}}
{{VTint|old
|location=Highgate
|lspan=2
|mile=129.830
|old=22
|exit=129
|road={{jct|state=VT|US|7|dir1=south|city1=Highgate Springs}}
|notes=Northern terminus of US&nbsp;7
}}
{{VTint|old
|mile=130.254
|old=–
|exit=–
|road={{jct|province=QC|QC|133|A|35|dir1=north|to2=yes|location1=[[Saint-Jean-sur-Richelieu]]|location2=[[Chambly, Quebec|Chambly]]|location3=[[Montreal|Montréal]]}}
|notes=Continuation into [[Quebec]]; future connection with [[Quebec Autoroute 35|A-35]]
}}
{{jctbtm|col=9|keys=concur,incomplete}}

==Related routes==
* I-89 Business (I-89 Bus.) was looped through the city of [[Lebanon, New Hampshire]], along US 4.
* [[Interstate 189|I-189]] is a connector between US 7 and I-89 in [[South Burlington, Vermont]].
* [[Interstate 289|I-289]] was slated to go around Burlington, but it was never completed. The lone completed section of the highway is signed as [[Vermont Route 289|VT 289]].

==See also==
*{{portal-inline|U.S. Roads}}
*{{portal-inline|New Hampshire}}
==References==
{{Reflist}}

==External links==
{{AttachedKML|display=title,inline}}
* {{Commons category-inline|Interstate 89}}

{{I-89 aux}}
{{Interstates}}

{{DEFAULTSORT:Interstate 89}}
[[Category:Interstate Highway System|89]]
[[Category:Interstate Highways in New Hampshire|89]]
[[Category:Interstate Highways in Vermont|89]]
[[Category:Transportation in Merrimack County, New Hampshire]]
[[Category:Transportation in Sullivan County, New Hampshire]]
[[Category:Transportation in Grafton County, New Hampshire]]
[[Category:Transportation in Windsor County, Vermont]]
[[Category:Transportation in Orange County, Vermont]]
[[Category:Transportation in Washington County, Vermont]]
[[Category:Transportation in Chittenden County, Vermont]]
[[Category:Transportation in Franklin County, Vermont]]