Illinois Route 170 is a north–south state road in north-central

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

. It runs from

Illinois Route 23 Illinois Route 23 (IL 23) is a north–south state highway in northern Illinois. It runs from Illinois Route 116 in Pontiac north to U.S. Route 14 south of Harvard. This is a distance of . Illinois 23 was established in 1918 as one of the or ...

well north of

Pontiac Pontiac may refer to: *Pontiac (automobile), a car brand *Pontiac (Ottawa leader) ( – 1769), a Native American war chief Places and jurisdictions Canada *Pontiac, Quebec, a municipality ** Apostolic Vicariate of Pontiac, now the Roman Catholic D ...

U.S. Route 6 U.S. Route 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War veterans association, is a main route of the U.S. Highway system. While it currently runs east-northeast from Bishop, California, to P ...

Seneca Seneca may refer to: People and language * Seneca (name), a list of people with either the given name or surname * Seneca people, one of the six Iroquois tribes of North America ** Seneca language, the language of the Seneca people Places Extrat ...

. This is a distance of .

Route description

Illinois 170 is a rural, two-lane surface road for its entire length. The road crosses

Illinois River The Illinois River ( mia, Inoka Siipiiwi) is a principal tributary of the Mississippi River and is approximately long. Located in the U.S. state of Illinois, it has a drainage basin of . The Illinois River begins at the confluence of the D ...

via a four-span

truss bridge A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or ...

. As of May 5, 2006, the

Illinois Department of Transportation The Illinois Department of Transportation (IDOT) is a state agency in charge of state-maintained public roadways of the U.S. state of Illinois. In addition, IDOT provides funding for rail, public transit and airport projects and administers fuel ...

is looking to replace the 74-year-old bridge. The old bridge was imploded on November 18, 2010.

History

SBI Route 160 originally ran from Red Bud to

Sparta Sparta ( Doric Greek: Σπάρτα, ''Spártā''; Attic Greek: Σπάρτη, ''Spártē'') was a prominent city-state in Laconia, in ancient Greece. In antiquity, the city-state was known as Lacedaemon (, ), while the name Sparta referre ...

; this became

Illinois Route 154 Illinois Route 154 is an east–west state road in southern Illinois. It runs from Illinois Route 3 in Red Bud to Illinois Route 37 in Whittington. This is a distance of . Route description Illinois 154 is the main east–west road th ...

in 1937. In 1946, it replaced Illinois Route 186 (previously Illinois Route 70A) from Seneca south to

Illinois Route 17 Illinois Route 17 (IL 17) is a rural, arterial east–west state highway that runs east from a former ferry crossing in New Boston along the banks of the Mississippi RiverIllinois Highway EndsIllinois 17. Retrieved April 21, 2006. to State R ...

near Budd. In 1995 Illinois 170 was extended further south to Illinois 23.

Major Intersections

References

{{reflist 170 Transportation in Livingston County, Illinois Transportation in LaSalle County, Illinois