U.S. Route 20 in Illinois
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| Ulysses S. Grant Memorial Highway | ||||
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| Route information | ||||
| Maintained by IDOT | ||||
| Length: | 233.93 mi (376.47 km) | |||
| Existed: | 1926 – present | |||
| Major junctions | ||||
| West end: |
 US 20 in East Dubuque
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  I-39 / US 51 in Rockford I-39 / I-90 / US 51 in Rockford I-355 in Addison  I-290 / I-294 in Elmhurst  US 12 / US 45 in Stone Park   I-290 / IL 110 (CKC) in Westchester I-55 in HodgkinsI-294 in Bridgeview I-94 in Chicago US 41 in Chicago |
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| East end: |
US 12 / US 20 / US 41 in Chicago
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| Highway system | ||||
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U.S. Route 20 (US 20) in the U.S. state of Illinois is a major arterial highway that runs from the Iowa state line at East Dubuque at the northwestern tip of Illinois, to the Indiana state line at Chicago south of the Chicago Skyway, a distance of 233.93 miles (376.47 km). For its entire length, US 20 is designated as the General Ulysses S. Grant Highway, often abbreviated the U.S. Grant Memorial Highway. However, this name is only commonly used west of Elgin. From Elgin to Melrose Park, US 20 follows Lake Street. It then follows Mannheim Road, and further south La Grange Road. US 20 also follows 95th Street as it turns east through Chicago's southwestern suburbs. It ultimately leaves Illinois on Indianapolis Boulevard.
As the highway enters Illinois across the Julien Dubuque Bridge, it continues southeasterly for a while, paralleling the Upper Mississippi River before turning east into the rugged country of the Driftless Area in Jo Daviess County, then turning flat and straight west of and entering Stephenson County. The Ulysses S. Grant Home, a national landmark, fronts near the highway at the eastern edge of Galena, Illinois.
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