I91

Interstate 91 (I-91) is a north–south Interstate Highway in the New England region of the United States. It runs from its southern terminus at I-95 in New Haven, Connecticut, north to the Canadian border in Derby Line, Vermont. The highway passes through three states: Connecticut, Massachusetts, and Vermont. It generally follows the Connecticut River valley in Connecticut and western Massachusetts and continues through the Green Mountains in Vermont, providing a principal corridor for travel and commerce in the region. The route serves as a major link between the New Haven area and northern Vermont and is important for cross-border traffic to Quebec.

In Connecticut, I-91 begins at I-95 and proceeds north through central Connecticut toward the Massachusetts border, providing access to towns along the river valley and connections with other state routes. In Massachusetts, the highway continues north-northwest through the western portion of the state, serving communities in the Pioneer Valley before entering Vermont. In Vermont, I-91 runs north to the border with Quebec, where the roadway continues as a provincial route into the province.

History and significance: I-91 is part of the original Interstate Highway System. It was constructed in segments during the 1950s and 1960s, with the last sections opening in the mid-1960s. It is a key regional corridor, complementing other major routes such as I-95 and I-90, and providing essential cross-border connectivity to Quebec.