Illinois Route 128
# Illinois Route 128

Illinois Route 128 is a north–south state route in east-central Illinois. It runs from Interstate 70 in Altamont to Illinois Route 121 in Dalton City. This is a distance of 55.57 miles (89.43 km).

## Route description

Illinois 128 is a two-lane, rural surface road for its entire length. Immediately north of Interstate 70, it overlaps U.S. Route 40 for 3 miles (5 km). It is also concurrent with Illinois Route 16 near Shelbyville.

Illinois 128 may or may not run through Moultrie County, depending on its exact routing, as the route appears to run along portions of the Shelby/Moultrie and Macon/Moultrie county lines.

## History

SBI Route 128 originally ran from U.S. Route 40 (originally Illinois Route 11) to Illinois 16 west of Shelbyville. In March 1937, it replaced IL 169 north of Shelbyville to Dalton City. Finally, as Interstate 70 was being built in the 1950s and 1960s, it was extended along U.S. 40 to Altamont.

## Major Intersections

| County | Location | mi | km | Destinations | Notes |
| - | - | - | - | - | - |
| Effingham | Altamont | 0.0 | 0.0 | I-70 – Effingham, St. Louis | I-70 exit 82 |
| Effingham | Altamont | 0.8 | 1.3 | US 40 east | South end of US 40 concurrency |
| Effingham–Fayette county line | ​ | 4.1 | 6.6 | US 40 west – Vandalia | North end of US 40 concurrency |
| Effingham–Fayette county line | ​ | 14.5 | 23.3 | IL 33 east – Beecher City | |
| Shelby | ​ | 30.9 | 49.7 | IL 16 west – Pana | South end of IL 16 concurrency |
| Shelby | Shelbyville | 34.0 | 54.7 | IL 16 east – Mattoon | North end of IL 16 concurrency |
| Moultrie | Dalton City | 55.57 | 89.43 | IL 121 – Decatur, Mattoon | |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||
