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| Stevenson Expressway (I-55) | |
|---|---|
| Name | Stevenson Expressway (I-55) |
| Route | Interstate 55 |
| Length mi | 140.00 |
| Established | 1956 |
| Termini | Chicago – St. Louis |
| States | Illinois |
Stevenson Expressway (I-55) The Stevenson Expressway (I-55) is an interstate highway corridor running from Chicago southwest toward the St. Louis through the Illinois region. It serves as a primary link between downtown Cook County and suburban and exurban communities, connecting major nodes such as Midway International Airport, Will County, and DuPage County. The route integrates with the Interstate Highway System, facilitating freight movement for industries tied to the Port of Chicago, Chicago Sanitary and Ship Canal, and interstate commerce corridors to the Mississippi River.
The expressway begins near the Chicago Loop and progresses southwest past Near West Side, adjacent to United Center, with interchanges providing access to Lake Shore Drive, Congress Parkway, and surface arterials paralleling Ogden Avenue and Pershing Road. It skirts the Bridgeport neighborhood and runs near McCormick Place before passing by Midway International Airport, linking to Pulaski Road and Kowanyama. Proceeding into Burbank, Illinois, it crosses Chicago Skyway and intersects with Interstate 294, providing connections toward the Tri-State Tollway and O'Hare International Airport. The corridor continues through Bolingbrook, Illinois, Romeoville, Illinois, and Joliet, Illinois, intersecting with routes to Interstate 80, Interstate 57, and U.S. Route 6, and crossing the Des Plaines River near Lockport, Illinois. Farther southwest it approaches Channahon, Illinois and Wilmington, Illinois, paralleling the Chicago and Alton Railroad alignment and terminating toward the St. Louis approaches where it merges with long-distance routes serving Springfield and Missouri connections.
Planning for the corridor traces to early 20th-century proposals for improved automotive links between Chicago and St. Louis, following preexisting corridors such as the Lincoln Highway and alignments of the Chicago and Alton Railroad. Construction accelerated with the Federal-Aid Highway Act of 1956 and the expansion of the Interstate Highway System, with segments completed throughout the late 1950s and 1960s. Early projects involved right-of-way negotiations with Cook County officials and suburban municipalities such as Hinsdale, Illinois and Oak Brook, Illinois. Subsequent decades saw upgrades tied to regional growth in Will County and Kendall County, influenced by freight traffic for Union Pacific Railroad connections and economic development linked to the Joliet Correctional Center area and Chicagoland logistics parks.
The expressway carries the Interstate designation Interstate 55 as part of the national network authorized by the Federal Highway Administration. Its local name commemorates political figures and civic influences tied to Chicago. Name changes and honorary designations have been approved by the Illinois General Assembly and endorsed by municipal councils in Chicago and Cook County. The corridor's numbering aligns with the Interstate convention for southwesterly routes connecting the Great Lakes region to the Gulf of Mexico via overland freight routes that feed into the Mississippi River system.
Traffic volumes reflect a mix of commuter flows serving Downtown Chicago and truck freight bound for St. Louis and western markets, including freight from the Port of Chicago and distribution centers in Naperville, Illinois and Bolingbrook, Illinois. Peak-period congestion affects interchanges near Midway International Airport and suburban nodes such as Willowbrook, Illinois and Romeoville, Illinois, influencing travel times to employment centers like O'Hare International Airport and industrial parks serving companies headquartered in Chicago. The corridor is part of regional planning discussions by the Chicago Metropolitan Agency for Planning and integrates with Metra commuter rail and PACE suburban bus networks.
Key interchanges include connections with Interstate 90, Interstate 290, Interstate 294, Interstate 80, and Interstate 57, as well as links to U.S. Route 66, U.S. Route 30, and state highways serving Illinois Route 59 and Illinois Route 53. Urban interchanges near Chicago Loop provide access to arterial streets such as Pulaski Road, Cicero Avenue, and Armitage Avenue. Suburban and exurban junctions serve logistics hubs in Joliet, Illinois and retail centers in Bolingbrook, Illinois while facilitating access to recreational areas along the Des Plaines River and heritage sites near Lockport, Illinois.
Maintenance responsibility falls to the Illinois Department of Transportation which coordinates capital projects funded by the Federal Highway Administration and state appropriations from the Illinois Department of Revenue. Improvements have included resurfacing contracts, bridge rehabilitation over the Chicago Sanitary and Ship Canal, interchange reconstructions near Midway International Airport, and deployment of intelligent transportation systems in coordination with Chicago Department of Transportation and regional traffic management centers. Recent projects targeted pavement preservation in Will County, Illinois and capacity enhancements near Romeoville, Illinois, with contractors such as Lunda Construction Company and Walsh Group engaged in reconstruction work.
The corridor has experienced high-profile incidents including multi-vehicle collisions involving tractor-trailers, hazardous-material spills requiring response by Chicago Fire Department and Illinois Environmental Protection Agency teams, and weather-related closures during Lake Michigan derecho events and winter storms managed by Illinois State Police and county highway departments. Safety improvements have included installation of median barriers, ramp reconfigurations, improved lighting in urban sections, and enforcement campaigns coordinated with the Cook County Sheriff's Office and Will County Sheriff's Office.
Planning efforts consider capacity and resilience upgrades linked to Chicago Metropolitan Agency for Planning regional plans, potential managed-lane concepts, interchange modernization near Joliet, Illinois, and multimodal integration with Metra and Amtrak corridors. Proposals have advanced for freight-rail grade separation projects to reduce conflicts with Union Pacific Railroad and BNSF Railway operations, incorporation of electric vehicle charging infrastructure, and stormwater management enhancements to address runoff into the Chicago Sanitary and Ship Canal and Des Plaines River. Funding discussions involve the Illinois Tollway Authority, state transportation bonds, and federal INFRA and BUILD grant programs.