Interstate 89 is a scenic highway serving the states of Vermont and New Hampshire. The freeway joins the capital cities of Montpelier and Concord as part of its northwestern route to Lake Champlain from southern New Hampshire. Continuing northward from Burlington, Interstate 89 transitions into Quebec Provincial Route 133, which leads north to Autoroute 35 for Montreal, Canada. Future construction will provide a seamless connection to Autoroute 35.
Parallel U.S. Routes
Interstate 89 briefly parallels U.S. 4 as it crosses from New Hampshire into Vermont before turning northward along an independent alignment to Montpelier. U.S. 2 accompanies the freeway west from Montpelier to Burlington, where U.S. 7 ties in northward to Milton and the Lake Champlain Islands. U.S. 2 turns west to South Hero while U.S. 7 stays adjacent to I-89 to the Canadian border at Highgate Springs.
In Vermont, Interstate 89 was built in stages through the 1960s. Specific opening dates for certain segments are as follows1:
- Montpelier to Middlesex (6.287 miles) – November 21, 1960
- Middlesex to Waterbury (5.106 miles) – December 31, 1960
- Waterbury to Bolton (7.049 miles) – November 20, 1961
- South Burlington to Winooski (3.388 miles) – November 29, 1962
- Winooski to Colchester (1.184 miles) – November 1, 1963
- Richmond to South Burlington (8.723 miles) – November 6, 1963
- Bolton to Richmond (6.745 miles) – October 30, 1964
- Colchester (6.486 miles) – November 1964
- Swanton to Highgate (5.538 miles) – 1965
Interstate 89 opened initially in New Hampshire between Warner and New London in November 1967. Completion within the state followed a year later.2
The last stretch of Interstate 89 constructed ran south from Memorial Drive at Montpelier to the temporary end at Vermont 14 by West Hartford.
NCDOT previously submitted the Interstate 89 designation for the U.S. 64 freeway corridor between Raleigh and Williamston and U.S. 17 leading northeast from Williamston to the Virginia state line at the AASHTO Special Committee on U.S. Route Numbering meeting on May 24, 20163. AASHTO ultimately approved Interstate 87 for the new corridor.4
North End – Highgate Springs, VT
- South End – Concord, NH
Branch Routes – 1
Total Mileage – 191.12
New Hampshire – 60.87
Cities – Concord, Lebanon
- Junctions –
Vermont – 130.25
Cities – Montpelier, Waterbury, Burlington, St. Albans, Swanton
- Junctions –
Source: December 31, 2017 Interstate Route Log and Finders List
I-89 Annual Average Daily Traffic (AADT)
|Location||Vehicles per day|
|West Lebanon-Lebanon, NH||36,289|
|White River Junction, VT||37,000|
|St. Albans, VT||16,600|
|Highgate Springs, VT||2,900|
Source: Traffic Volume Report 2002 (NHDOT)
2002 (Route Log) AADTs State Highways (VTRANS)
Interstate 89 was complete from a temporary end west of Bolton to Memorial Drive at Montpelier by 1963 and from I-189 to U.S. 2 (Main Street) at South Burlington. Construction was underway north to Winooski and from Swanton to the Canadian border.
North End – Canadian International Border – Highgate Springs, Vermont
South End – Concord, New Hampshire
- Outline History of Vermont State Highways – National Highway Week, September 19-25, 1965. Prepared for informational purposes only by the Vermont Department of Highways.
- “100th Anniversary Series Part III – The Interstate Highway System.” New Hampshire Highways, May / June 2004 edition.
- Special Committee on U.S. Route Numbering meeting scheduled for May 24, 2016, agenda packet, AASHTO 2016 Spring Meeting in Des Moines, Iowa.
- “North Carolina Gains Names for Two New Interstate Designations.” North Carolina Department of Transportation, press release. May 25, 2016.
Page updated May 25, 2016.