High Quality Content by WIKIPEDIA articles! Interstate 93 (abbreviated I-93) is an Interstate Highway in the New England section of the United States. Its southern terminus is in Canton, Massachusetts, in the Boston metropolitan area, at Interstate 95; its northern terminus is near St. Johnsbury, Vermont, at Interstate 91. It is one of three mainline Interstate highways whose entire route is located within the New England states, the other two being I-89 and I-91. The largest cities along its route are Manchester, New Hampshire, Concord, New Hampshire and Boston, Massachusetts.