The Tri-State Tollway is a major highway in the United States, primarily located in the state of Illinois. It connects several key areas, including the city of Chicago and its surrounding suburbs. The tollway is part of the larger Illinois Tollway system and is designated as Interstate 294 (I-294). It serves as a vital route for commuters and travelers, facilitating efficient transportation across the region. The tollway spans approximately 40 miles and features multiple interchanges with other highways, enhancing connectivity. It is known for its electronic toll collection system, which allows drivers to pay tolls without stopping. The Tri-State Tollway plays a crucial role in managing traffic flow and supporting economic activity in the area.