What is the longest interstate highway in the country?
That distinction goes to Interstate 90, which spans 3,111.52 miles from Boston to Seattle. Among major cities the interstate runs through: Seattle; Spokane, Wash; Sioux Falls, S.D.; Madison, Wis.; Chicago; Gary, Ind.; Toledo, Ohio; Cleveland; Erie, Pa.; Buffalo; Syracuse, N.Y.; Albany, N.Y.; and Boston. Live Wire is published on Thursdays.