Interstate 91

Interstate 91
Interstate 91
	I-91 highlighted in red
Route information
Length	290.37 mi (467.31 km)
NHS	Entire route
Major junctions
South end	I-95 / SR 724 in New Haven, CT
	I-691 / Route 66 / Route 15 / Wilbur Cross Parkway in Meriden, CT; Route 9 in Cromwell, CT; I-84 / US 6 / US 44 in Hartford, CT; I-291 / US 20 / Route 20A in Springfield, MA; I-391 in Chicopee, MA; US 5 in West Springfield, MA; Route 9 in Northampton, MA; Route 2 in Greenfield, MA; I-89 in White River Junction, VT; I-93 in St. Johnsbury, VT;
North end	A-55 at the Canadian border
Location
Country	United States
States	Connecticut, Massachusetts, Vermont
Counties	CT: New Haven, Middlesex, Hartford; MA: Hampden, Hampshire, Franklin; VT: Windham, Windsor, Orange, Caledonia, Orleans
Highway system
	Interstate 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;

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,^[2] 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.

^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Archived from the original on July 3, 2017. Retrieved December 10, 2022.
^ "New Haven, CT" (Map). Google Maps. Retrieved June 8, 2009.