Illinois Route 40 is a north-south highway that runs through the state of Illinois. It stretches approximately 150 miles, connecting the cities of Rock Island and Mason City. The route serves as a vital link for local traffic and provides access to various communities along the way. The highway is primarily a two-lane road, with some sections featuring additional lanes for safety and efficiency. Illinois Route 40 intersects with several major highways, making it an important corridor for both commercial and recreational travel in the region.