 Because of a "turn off to stay on" interchange with I-74 and I-280 near Colona, Illinois, called "the Big X", I-74 through traffic is urged to use I-80 around the Quad Cities to the Big X.At the Big X, traffic from both I-74 and I-80 must exit their respective freeways to continue on the same route.Near the Mississippi River, the Interstate takes a sharp curve to the southeast to line up perpendicularly to the river.