Illinois Route 19 (abbreviated IL-19, or simply Illinois 19) is a major east–west arterial state highway in northeastern Illinois, United States. It runs from Illinois Route 25 (Liberty St.) in Elgin, to Lake Shore Drive (U.S. Route 41) on the north side of Chicago. Illinois 19 is long. For much of its length, it is also known as Irving Park Road and Chicago-Elgin Road. Route description Illinois 19 fluctuates from being a two lane road in rural parts to six lanes by highway interchanges. In Elgin, the road is mostly four lanes, narrowing to two in relatively undeveloped, forested sections between Illinois Route 59 and Elgin. East of Barrington Road, the road becomes a main artery through the western suburbs of Chicago. The Elgin-O'Hare Expressway (now known as Illinois Route 390) was built in part to reduce traffic on Illinois 19 through Roselle and Itasca. The road narrows from six to two lanes between Schaumburg and Roselle, and again (from four lanes to two) in Medinah and through Itasca. The road then becomes four lanes in Wood Dale and maintains this width to its eastern terminus, except for a narrower stretch between N. Cumberland Avenue (Illinois 171) and N. Austin Avenue in Chicago. East of Bensenville Illinois 19 becomes one of only seven state highways to enter the city of Chicago. It passes along the current southern border of O'Hare International Airport and serves as the main gateway for western suburbs to access the airport. At the Tri-State Tollway in Schiller Park, traffic on Illinois 19 may enter the northbound lanes of the tollway. Traffic wishing to enter the southbound lanes must enter at Balmoral (via Mannheim) or Interstate 190 to the north. The Chicago city limits officially start at the Des Plaines River. Illinois 19 runs through the O'Hare, Dunning, Portage Park, Irving Park, North Center and Lake View neighborhoods before ending at a traffic signal beneath Lake Shore Drive (U.S. Route 41). The road used to be named Chicago-Elgin Road, but east of Elgin it has been renamed Irving Park Road, for the Irving Park neighborhood of Chicago located between Cicero Avenue and the north branch of the Chicago River in Chicago. In Elgin itself, it has since been renamed East Chicago Street. As of 2005, some signage on approaching streets still identified Irving Park Road as Chicago-Elgin Road. History The original Route 19 was designated in 1918