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| U.S. Route 150 (Illinois) | |
|---|---|
| State | IL |
| Type | US |
| Route | 150 |
| Length mi | 267.47 |
| Established | 1926 |
| Direction a | West |
| Terminus a | Keokuk |
| Direction b | East |
| Terminus b | Chicago |
| Counties | Henderson County, Warren County, Mercer County, Rock Island County, Henry County, Bureau County, LaSalle County, Marshall County, Putnam County, Grundy County, Will County, Cook County |
U.S. Route 150 (Illinois) is a United States Numbered Highway that runs across central and northeastern Illinois from the Mississippi River at Keokuk to Chicago. Established in 1926, the route connects a sequence of regional centers including Galesburg, Kewanee, Prattville, LaSalle, Peru, Joliet and suburbs of Chicago. The highway serves freight, commuter, and agricultural traffic and intersects several major corridors including Interstate 74, Interstate 80, and Interstate 55.
U.S. Route 150 enters Illinois via the Keokuk–Hamilton Bridge from Keokuk and immediately passes through Henderson County and into Warren County near Monmouth and Galesburg, where it overlaps segments of Illinois Route 34 and meets U.S. Route 34 and U.S. Route 67. East of Galesburg the road traverses prairie and farm country through Knox County into Mercer County and Rock Island County, intersecting Interstate 74 at Moline and passing near Sioux City–area freight links and Burlington corridors. Continuing northeast the route crosses Henry County and connects with U.S. Route 6 near Kewanee and Interstate 80 in LaSalle County near Peru, where historical river crossings and Illinois and Michigan Canal remnants are nearby. Through Grundy County the highway runs concurrent with Illinois Route 47 and approaches Joliet and the Channahon area, intersecting Interstate 55 and U.S. Route 52. The eastern segments run through Will County and into Cook County, paralleling Chicago Sanitary and Ship Canal infrastructure before terminating in Chicago with connections to city arterials and proximity to Chicago Union Station and Lake Shore Drive corridors.
The designation of U.S. Route 150 in Illinois dates to the original 1926 United States Numbered Highway plan promulgated contemporaneously with the early federal highway initiatives and subsequent state system expansions overseen by the Illinois Department of Transportation. Early routings followed established turnpikes, stagecoach roads, and alignments near the Illinois River and Mississippi River that linked river ports such as Keokuk and inland centers like Galesburg and Joliet. Over decades U.S. 150 underwent realignments to accommodate Interstate 74 construction, flood-control projects by the U.S. Army Corps of Engineers, and urban bypasses in Joliet and Chicago influenced by transit and rail modernization efforts from companies such as Santa Fe and BNSF Railway. Portions of U.S. 150 were once routed on surface streets that later received state or local jurisdiction through agreements with counties and municipalities including Rock Island, LaSalle County, and Will County. Preservation of historic bridges and alignments has involved coordination with the National Park Service and state historic preservation offices amid local economic development initiatives tied to Lincoln Highway-era tourism and Route 66 heritage in adjacent corridors.
The route intersects and overlaps multiple principal corridors: - At Keokuk: crossing of the Mississippi River and connection to U.S. Route 61. - Near Galesburg: junctions with U.S. 34 and U.S. 67. - In the Quad Cities area: connections to Interstate 74 and proximity to U.S. 6. - In Kewanee: concurrency with Illinois Route 78 and links to Interstate 80 in LaSalle County near Peru. - In Joliet: intersections with Interstate 55, U.S. 52, and state routes serving Will County suburbs. - Eastern terminus in Chicago: interchanges and arterial connections serving Lake Shore Drive, Chicago Union Station, and metropolitan freight routes tied to Port of Chicago facilities.
Several numbered routes and historic corridors interact with U.S. 150 in Illinois: - U.S. Route 6, U.S. Route 34, U.S. Route 52, U.S. Route 61, and U.S. Route 67 provide cross-state linkages through Iowa, Missouri, and Indiana. - Interstate corridors including Interstate 74, Interstate 80, and Interstate 55 parallel or intersect U.S. 150, reflecting federal highway planning with agencies such as the Federal Highway Administration. - State routes such as Illinois Route 47 and Illinois Route 78 form concurrencies and spur connections to county-maintained roads in Marshall County and Putnam County. - Historic alignments and nearby heritage corridors include the Illinois and Michigan Canal, Lincoln Highway, and the Chicago Portage National Historic Site.
Planned and proposed projects affecting U.S. 150 involve improvements coordinated by the Illinois Department of Transportation and regional planning bodies like the Chicago Metropolitan Agency for Planning. Proposals include pavement rehabilitation in Rock Island County, bridge replacements influenced by U.S. Army Corps of Engineers floodplain management near the Illinois River, and interchange upgrades adjacent to Interstate 80 to improve freight access for facilities linked to the Port of Chicago and BNSF Railway. Local initiatives in Joliet and Galesburg prioritize safety enhancements, pedestrian accommodations near Chicago Union Station-area transit hubs, and multimodal connections supported by federal funding streams including transportation bills that authorized interstate and rural route grants.