Illinois Route 390 (IL 390), previously known as the Elgin–O'Hare Expressway, now known as the Elgin–O'Hare Tollway, is a controlled-access toll road in northeastern Illinois. IL 390 currently connects U.S. Route 20 (US 20, Lake Street) in Hanover Park to the interchange with Illinois Route 83 (IL 83) and Thorndale Avenue in Wood Dale. The only other towns it borders are Schaumburg and Roselle. Construction is underway to extend the road from IL 83 to the western edge of O'Hare International Airport.
Route description
IL 390 begins at an interchange with US 20 in Hanover Park and branches off northeastward as a six-lane toll road, traveling over a half-mile-long (0.8 km) bridge over the Metra Milwaukee District West Line tracks, and some wetlands. The highway then enters Cook County from DuPage County and has an interchange with IL 19 (Irving Park Road). At Meacham Road, the highway crosses back south into DuPage County. Continuing east for , IL 390 traverses portions of the suburbs of Schaumburg, Roselle, Medinah, Elk Grove Village, and then has an interchange with IL 53 before a major interchange with I-290 in Itasca. IL 390 continues east for through Wood Dale, Elk Grove Village (again), and Bensenville, and finally ends at an interchange with IL 83 in Bensenville just short of the west side of O'Hare International Airport. IL 390 was the first route in the state to have all-electronic toll collection, predating the 2021 conversion to all-electronic tolling on all Illinois State Toll Highway Authority roads; cash is not accepted, and an I-Pass/E-ZPass is required. The mileposts are measured from the planned western terminus in Elgin.