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The Tri-State Tollway is a toll highway in the northeastern part of the US state of Illinois. It follows:

  • Interstate 80 from South Holland at I-94, and Illinois Route 394 (IL 394) to Hazel Crest;
  • Interstate 294 from South Holland at I-80/I-94, and IL 394 to Northbrook; and
  • Interstate 94 from Northbrook to the Wisconsin state line at Newport Township.