Interstate 294 (I-294) is a tolled Interstate Highway in northeastern Illinois. It forms the southern portion of the Tri-State Tollway in Illinois. I-294 runs from South Holland at Interstates 80 and 94, and Illinois Route 394 to Northbrook at I-94. Interstate 294 is long; are shared with I-80. It serves as a bypass around the city of Chicago. Interstate 294 is also the longest auxiliary route of Interstate 94, being 10 miles longer than Interstate 494 in Minneapolis-Saint Paul. Interstate 294 is also the longest auxiliary interstate highway in Illinois.