Illinois Route 122 is an east–west highway

Highway

A highway is any public road. In American English, the term is common and almost always designates major roads. In British English, the term designates any road open to the public. Any interconnected set of highways can be variously referred to as a "highway system", a "highway network", or a...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Illinois

Illinois

Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

. Its western terminus is at a junction with Illinois Route 29

Illinois Route 29

Illinois Route 29 is a two to four lane state road that runs south from U.S. Route 6/Illinois Route 89 at Spring Valley to U.S. Route 51/Illinois Route 16 at Pana, running through Pekin, Peoria and Springfield. The nearest major north–south highway, Interstate 39, runs parallel to Illinois...

 west of Delavan

Delavan, Illinois

Delavan is a city in Tazewell County, Illinois, United States. The population was 1,825 at the 2000 census. It is part of the Peoria, Illinois Metropolitan Statistical Area.-Government:...

. It runs east to a junction with Illinois Route 9

Illinois Route 9

Illinois Route 9 is a cross-state, east–west rural state highway in central Illinois. It runs from the Fort Madison Toll Bridge over the Mississippi River to Iowa in Niota east to State Road 26 at the Indiana border. This is a distance of ....

 in McLean County

McLean County, Illinois

McLean County is a county in the U.S. state of Illinois. McLean County is included in the Bloomington–Normal, Illinois Metropolitan Statistical Area. According to the 2010 census, it has a population of 169,572, which is an increase of 12.7% from 150,433 in 2000. Its county seat is...

 west of Bloomington

Bloomington, Illinois

Bloomington is a city in McLean County, Illinois, United States and the county seat. It is adjacent to Normal, Illinois, and is the more populous of the two principal municipalities of the Bloomington-Normal metropolitan area...

. Illinois 122 is 31.53 miles (50.74 km) long.

Route Description

Illinois Route 122 begins at Illinois Route 29, 5 miles west of Delavan. The highway travels east through Delavan. Five miles east of Delavan, the highway makes a 3 mile northbound concurrency with Interstate 155

Interstate 155 (Illinois)

Interstate 155 is a north–south spur of Interstate 55 that provides an interstate connection for the Illinois cities of Peoria and Lincoln. The northern terminus for the interstate is just east of Peoria, at Interstate 74 exit 101 in Morton. The southern terminus, which is northwest of...

. After its concurrency with Interstate 155, the highway travels mainly east, passing along the north sides of Hopedale, Minier, and Stanford. East of Stanford, the highway shifts direction and travels due north for 4 miles. The highway then continues east for less than one mile to its eastern terminus at Illinois Route 9.
This route serves the Tazewell County

Tazewell County, Illinois

Tazewell County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 135,394, which is an increase of 5.4% from 128,485 in 2000. Its county seat and largest city is Pekin. The majority of the population live in the suburbs and bedroom communities...

 city of Delavan and the villages of Hopedale and Minier. It also serves the McLean County

McLean County, Illinois

McLean County is a county in the U.S. state of Illinois. McLean County is included in the Bloomington–Normal, Illinois Metropolitan Statistical Area. According to the 2010 census, it has a population of 169,572, which is an increase of 12.7% from 150,433 in 2000. Its county seat is...

 village of Stanford.

History

SBI Route 122 ran from Havana

Havana, Illinois

Havana is a city in Mason County, Illinois, United States. The population was 3,577 at the 2000 census, and 3,260 at a 2009 estimate. It is the county seat of Mason County.-Geography:...

 at the Illinois River

Illinois River

The Illinois River is a principal tributary of the Mississippi River, approximately long, in the State of Illinois. The river drains a large section of central Illinois, with a drainage basin of . This river was important among Native Americans and early French traders as the principal water route...

 to Bloomington on what was Illinois Route 9

Illinois Route 9

Illinois Route 9 is a cross-state, east–west rural state highway in central Illinois. It runs from the Fort Madison Toll Bridge over the Mississippi River to Iowa in Niota east to State Road 26 at the Indiana border. This is a distance of ....

, Illinois 122, Illinois Route 29

Illinois Route 29

Illinois Route 29 is a two to four lane state road that runs south from U.S. Route 6/Illinois Route 89 at Spring Valley to U.S. Route 51/Illinois Route 16 at Pana, running through Pekin, Peoria and Springfield. The nearest major north–south highway, Interstate 39, runs parallel to Illinois...

 and U.S. Route 136

U.S. Route 136

U.S. Highway 136 is a spur of U.S. Highway 36. It runs from Edison, Nebraska, at U.S. Highway 6 and U.S. Highway 34 to the Interstate 74/Interstate 465 interchange in Speedway, Indiana. This is a distance of 804 miles .-Nebraska:...

. By 1937, the routing of Illinois 122 had been settled.

Major intersections