It is located at the 1600 North parallel of Chicago.Just east of the Kennedy Expressway (I-90/I-94), the North Avenue Bridge carries IL 64 over the North Branch of the Chicago River.The hybrid suspension/cable-stayed bridge was built in 2006, replacing a bascule bridge dating back to 1907.Between Halsted and Sheffield Avenues, North Avenue has become a shopping destination, known as the Clybourn Corridor.In 1937, the road was extended west from Sycamore to what was then US 51 (and is now IL 251).Illinois Route 64 (IL 64) is an east–west state highway in Northern Illinois.Its western terminus is at the Iowa state line, connecting with U. Route 52 (US 52) and Iowa Highway 64 via the Savanna-Sabula Bridge at the Mississippi River west of Savanna.At IL 59, the road widens further from four to six lanes and becomes a divided highway until its intersection with IL 83 in Elmhurst.
At the Des Plaines River and IL 43, North Avenue becomes four lanes until it reaches Nort Western Avenue.At this point, it becomes at times a two-lane road, for the rest of its route through Chicago.IL 64 then travels east through Mount Carroll, Lanark, Mount Morris, Oregon, Sycamore, Lily Lake, Saint Charles and the western suburbs of Chicago before terminating at U. Route 41 (US 41, Lake Shore Drive) on the city's north side. IL 64 overlaps US 52 between the Iowa state line and Brookville—a distance of over 20 miles (32 km)—so that the IL 64 designation can carry over to Iowa.East of the Mississippi River, IL 64 is largely a rural, undivided surface road from Savanna to the Fox River in Saint Charles. Charles, IL 64 enters the Chicago metro area and becomes a four-lane road, taking on the name of Main Street. Charles, IL 64 becomes North Avenue and retains this designation until just before its terminus in Chicago at US 41 (Lake Shore Drive).One-half mile (0.8 km) west of US 41, IL 64 turns north onto La Salle Boulevard, and then east, before terminating at Lake Shore Drive.
North Avenue is a main east–west artery in Chicago itself, and one of only seven state routes to enter the city.