Illinois Route 390 (IL 390), previously known as the Elgin–O'Hare Expressway, now known as the Elgin–O'Hare Tollway, is a electronic toll highway in northeastern Illinois. IL 390 currently connects U.S. Route 20 (US 20, Lake Street) in Hanover Park to the intersection 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 intersects 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 intersects 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 intersection 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. History Although the concept of an Elgin–O'Hare Expressway dates back to the 1960s, the highway was not seriously considered until the late 1980s. Around that time, congestion was rapidly increasing on local roads, especially US 20 (Lake Street). Although Lake Street was extensively widened prior to the completion of the highway, initially to Glen Ellyn Road and then to the Roselle-Bloomingdale border nearly ten years later, its capacity was still insufficient for the rapidly growing western suburbs. Construction on the highway began around 1991 and was completed two years later. Governor Jim Edgar opened the highway at an afternoon ceremony on November 2, 1993. When the highway first opened, both of its termini had traffic signals with major arterial roads in the area. This arrangement caused large backups during weekday rush hours. According to the Illinois Department of Transportation (IDOT), average daily traffic counts