Illinois Route 170

Illinois Route 170 is a north–south state road in north-central Illinois. It runs from Illinois Route 23 well north of Pontiac to U.S. Route 6 in Seneca. This is a distance of 25.00 miles (40.23 km).[1]

Illinois Route 170 marker

Illinois Route 170

IL 170 highlighted in red
Route information
Maintained by IDOT
Length25.00 mi[1] (40.23 km)
Existed1946[2]–present
Major junctions
South end IL 23 in Cornell
North end US 6 in Seneca
Location
CountryUnited States
StateIllinois
CountiesLivingston, LaSalle
Highway system
← IL 169→ IL 171

Route description
A view of Illinois Route 170 in Seneca, Illinois looking north

Illinois 170 is a rural, two-lane surface road for its entire length. The road crosses Illinois River via a four-span truss bridge.[3] As of May 5, 2006, the Illinois Department of Transportation is looking to replace the 74-year-old bridge.[4] The old bridge was imploded on November 18, 2010.

History

SBI Route 160 originally ran from Red Bud to Sparta; this became Illinois Route 154 in 1937. In 1946, it replaced Illinois Route 186 (previously Illinois Route 70A) from Seneca south to Illinois Route 17 near Budd.[5][6][7] In 1995 Illinois 170 was extended further south to Illinois 23.[2]

Major Intersections
CountyLocationmi[8]kmDestinationsNotes
Livingston​0.00.0 IL 23
​7.211.6 IL 17
LaSalleSeneca25.0040.23 US 6 (Jackson St)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
Template:Attached KML/Illinois Route 170
KML is not from Wikidata
  1. Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08.
  2. Carlson, Rich (2005-04-15). "Illinois Highways Page: Routes 161 through 180". Retrieved 2006-08-14.
  3. Baughn, James; et al. (2006-01-09). "Historic Bridges of the U.S. – Seneca Bridge, LaSalle County, Illinois". Retrieved 2006-08-15.
  4. Illinois Department of Transportation (2006-05-05). "Open House Public Hearing Meeting: For Removal And Replacement Of The Illinois 170 Bridge Over The Illinois River In Seneca". Retrieved 2006-08-15.
  5. Illinois Secretary of State; Rand McNally (1936). Road Map Illinois (Map). [c. 1:950,000 and c. 1:1,110,000]. Springfield: Illinois Secretary of State – via Illinois Digital Archives.
  6. Illinois Secretary of State; Rand McNally (1939). Illinois Road Map (Map) (1939–1940 ed.). c. 1:918,720. Springfield: Illinois Secretary of State – via Illinois Digital Archives.
  7. Illinois Secretary of State; Rand McNally (1946). Illinois Road Map (Map). c. 1:918,720. Springfield: Illinois Secretary of State – via Illinois Digital Archives.
  8. Google (March 9, 2017). "Overview Map of IL 170" (Map). Google Maps. Google. Retrieved March 9, 2017.
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