Interstate 91

Interstate 91 (I-91) is an Interstate Highway in the New England region of the United States. It is the primary north–south thoroughfare in the western part of the region. Its southern terminus is in New Haven, Connecticut, at I-95, while the northern terminus is in Derby Line, Vermont, at the Canada–United States border. Past the Derby Line–Rock Island Border Crossing, the road continues into Canada as Quebec Autoroute 55. I-91 is the longest of three Interstate highways whose entire route is located within the New England states (the other two highways being I-89 and I-93) and is also the only primary (two-digit) Interstate Highway in New England to intersect all five of the other highways that run through the region. The largest cities along its route, from south to north, are New Haven, Connecticut; Hartford, Connecticut; Springfield, Massachusetts; Northampton, Massachusetts; Greenfield, Massachusetts; Brattleboro, Vermont; White River Junction, Vermont; St. Johnsbury, Vermont; and Newport, Vermont.

Interstate 91

I-91 highlighted in red
Route information
Length290.37 mi (467.31 km)
NHSEntire route
Major junctions
South end I-95 / Route 34 in New Haven, CT
Major intersections
North end A-55 at the Canada–United States border in Derby Line, VT
Location
CountryUnited States
StatesConnecticut, Massachusetts, Vermont
CountiesCT: New Haven, Middlesex, Hartford
MA: Hampden, Hampshire, Franklin
VT: Windham, Windsor, Orange, Caledonia, Orleans
Highway system
  • Main
  • Auxiliary
  • Suffixed
  • Business
  • Future
  • Connecticut State Highway System
  • Interstate
  • US
  • State
    • SSR
    • SR
  • Scenic
  • Massachusetts State Highway System
  • Interstate
  • US
  • State
  • State highways in Vermont
Route 89CT Route 94
I-90MA I-93
I-89VT I-93
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