Interstate 91

Interstate 91 is a major north–south Interstate Highway in the New England region of the United States. It runs for approximately 290 miles from its southern terminus at Interstate 95 in New Haven, Connecticut to the Canada–United States border at Derby Line, Vermont, connecting to Quebec Autoroute 55. The highway serves as a vital transportation corridor through the Connecticut River Valley, linking major cities including Hartford, Springfield, and Brattleboro.

Route description

The highway closely parallels the Connecticut River for much of its length, providing scenic views of the valley. In Connecticut, it passes through the Greater Hartford metropolitan area, intersecting with Interstate 84 and Interstate 291. Through Massachusetts, it serves the Pioneer Valley, with key segments near the University of Massachusetts Amherst and the City of Northampton. The route traverses the rolling hills of Vermont, passing near Mount Ascutney before reaching the international border. Notable engineering features include the Charter Oak Bridge in Hartford and the Veterans Memorial Bridge in Springfield.

History

The route's alignment was designated as part of the original Interstate Highway System in 1956, with construction beginning in the late 1950s. Key sections opened progressively, including the segment through Downtown Springfield in the 1960s and the final stretch to the Canada–United States border in the 1970s. The project required significant cooperation between the Federal Highway Administration and state departments of transportation in Connecticut, Massachusetts, and Vermont. Planning was influenced by the existing New Haven and Northampton Company rail line and the need to modernize the U.S. Route 5 corridor.

Major junctions

From south to north, key intersections include its start at Interstate 95 in New Haven, Connecticut. In Hartford, it meets Interstate 84 and Connecticut Route 15. In Springfield, it interchanges with Interstate 90 (the Massachusetts Turnpike) and Interstate 291. Further north in Holyoke, it connects with Massachusetts Route 141. In Greenfield, it meets Interstate 91's spur, Interstate 91. The northern terminus is at the Canada–United States border, connecting to Quebec Autoroute 55.

Auxiliary routes

Several auxiliary routes support the main highway. In Connecticut, Interstate 691 provides a critical link between the city of Meriden and Interstate 84. Interstate 291 forms a partial beltway around Hartford. In Massachusetts, Interstate 291 serves as a connector in Springfield, while Interstate 391 provides access to the cities of Chicopee and Holyoke. The planned Interstate 491 in Hartford was never constructed.

Category:Interstate Highways in New England Category:Transportation in Connecticut Category:Transportation in Massachusetts Category:Transportation in Vermont