Illinois Route 56
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| Butterfield Road Lincolnway Street Bill Hewitt Memorial Highway |
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| Route information | ||||
| Maintained by IDOT | ||||
| Length: | 32.52 mi (52.34 km) | |||
| Existed: | 1924 – present | |||
| Major junctions | ||||
| West end: |
  US 30 / IL 47 in Sugar Grove
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    I-88 / IL 110 (CKC) in Aurora I-88 / IL 31 / IL 110 (CKC) in Aurora I-355 in Downers Grove
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| East end: |
   US 12 / US 20 / US 45 in Bellwood
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| Location | ||||
| Counties: | Kane, DuPage, Cook | |||
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Illinois Route 56 (IL 56) is an east–west state road in northern and northeastern Illinois. It runs from the interchange of Illinois Route 47 at U.S. Route 30 (US 30) in Sugar Grove east to US 12/US 20/US 45 (Mannheim Road) by Bellwood. This is a distance of 32.52 miles (52.34 km).
Illinois 56 parallels Interstate 88 (Ronald Reagan Memorial Tollway) for its entire length and merges with it at Illinois Route 31, making it the only state road to be marked as a toll road—only Illinois Route 190 and Illinois Route 5 have ever had this distinction. Travelling eastbound, it begins at US 30 in Sugar Grove just west of Orchard Road and then runs with the I-88 tollway until intersecting Illinois Route 31. The route travels north with IL 31 briefly, then crosses over the Fox River. From there, the route heads in a northeasterly direction, paralleling I-88 to the north. The route ends at US 12/US 20/US 45.
Route 56 is called Butterfield Road for its entire length east of Illinois Route 25 until it meets its end as Washington Boulevard in Bellwood. It serves the Chicago suburbs of Aurora, Downers Grove, Elmhurst, Oak Brook, Wheaton, and other communities, as well as the College of DuPage, Oakbrook Center shopping mall, and farther out, the Fermilab in Batavia. Butterfield Road is a major arterial road within the Illinois Technology and Research Corridor.
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