U.S. Route 45 in Illinois

U.S. Route 45 marker

U.S. Route 45
Route information
Maintained by IDOT
Length: 428.99 mi[1] (690.39 km)
Major junctions
South end: US 45 near Brookport

I-24 in Metropolis
I-64 near Mill Shoals
US 50 in Flora
I-70 / US 40 in Effingham
I-74 in Urbana
I-57 in Kankakee
US 30 in Frankfort
I-80 in Tinley Park
I-55 in Hodgkins

US 20 in Stone Park
North end: US 45 near Antioch
Counties: Massac, Johnson, Williamson, Saline, Gallatin, White, Wayne, Clay, Effingham, Shelby, Cumberland, Coles, Douglas, Champaign, Ford, Iroquois, Kankakee, Will, Cook, Lake
Highway system
IL 43IL 47

In the U.S. state of Illinois, U.S. Route 45 is a major north–south highway that runs from the Brookport Bridge over the Ohio River at Brookport north through rural sections of eastern Illinois and then through the suburbs of Chicago to the Wisconsin border east of Antioch. This is a distance of 428.99 miles (690.39 km).[1] U.S. 45 is the longest numbered route in Illinois.

Route description

US 45 north of IL 141


US 45 serves as the western boundary of the University of Illinois at Urbana-Champaign campus. Entering downtown Champaign as Neil Street, US 45 then goes east on Springfield Avenue, running concurrently with US 150. Farther east of downtown Champaign, it again serves as a boundary for the campus. Following Wright Street, US 45 then moves east on University Avenue, forming the northern border of the University. This path continues to Cunningham Avenue in Urbana. US 45 then turns onto Cunningham Avenue northward towards Chicago.

Kankakee to Hickory Hills

US 45 overlaps US 52 at an intersection with Illinois 49 east of Ashkum. US 45/52 intersects with Illinois Route 17 in Kankakee and Illinois Route 102 in Bourbonnais. Just west of Peotone, US 52 takes a westward course, and US 45 heads north. From this point on until its intersection with Cermak Road/22nd Street in Westchester, US 45 is also known as La Grange Road.

In Frankfort, US 45 intersects with US 30. From that point on until its interchange with Archer Avenue/Illinois Route 171, US 45/La Grange Road is also known as 96th Avenue (9600 W in Chicago's street grid, 96 blocks and 12 miles (19 km) west of State Street). During this stretch it intersects with Interstate 80 and US 6/159th Street in Orland Park. It also intersects Illinois Route 83 (Calumet Sag Road) for the first time in Palos Hills, just south of the Cal-Sag Channel.

Starting at 95th Street near Hickory Hills, US 45 becomes concurrent US 12 and US 20. Two miles further north, at Archer, the road loses its 96th Avenue designation; this is due to the road entering suburbs that do not use Chicago's address system, and that most of its alignment north of Archer would be at 10000 W anyway, if the address system extended to these suburbs.

Hickory Hills to O'Hare International Airport

The concurrent US 12/20/45, past 87th Street, briefly becomes a 4-lane freeway as it intersects with Illinois Route 171 (Archer Avenue) in Justice and Interstate 55 (The Stevenson Expressway) in Hodgkins (along with Interstate 294, which only has a southbound interchange ramp). North of Interstate 55, US 12/20/45 becomes a regular 4-lane highway before itintersects with the former US 66 at Joliet Road in Countryside.

In Downtown La Grange, US 12/20/45 intersects the Burlington Northern/Santa Fe railroad tracks and intersects with US 34 (Ogden Avenue), possibly the only intersection of 4 separate US routes in Illinois.

Following the intersection with US 34, US 12/20/45 passes through La Grange Park (as La Grange Road), moving in a slight northwesterly direction. After passing over Salt Creek, US 12/20/45 intersects with Cermak Road/22nd Street in Westchester and is known as Mannheim Road north of this intersection. Mannheim Road, as US 12/20/45 serves as the Eastern starting point for Illinois Route 38 (Roosevelt Road) in Hillside, has a full interchange with Interstate 290, also in Hillside, and serves as the Eastern starting point for Illinois Route 56 (briefly Washington Boulevard in Bellwood, before becoming Butterfield Road).

After passing over a Union Pacific rail yard, US 45 becomes concurrent with only US 12 in Melrose Park as US 20 breaks off at Lake Street there. US 12 and US 45 remain concurrent on Mannheim Road, passing Interstate 294 again without an interchange, but, after passing Illinois Route 19 (Irving Park Road), has a full interchange with Interstate 190, which leads directly to O'Hare International Airport or Interstate 90 East (into Chicago). This area between IL19 and IL72 once ran straight though but was realigned to the east in 1960 for the construction of O'hare's 4R22L runway.

O'Hare International Airport to Antioch

Past O'Hare airport, US 12/45 intersects with Illinois Route 72 in Illinois, and continues along Mannheim Road in Des Plaines. Mannheim Road ends and feeds into Lee Street at the end of an S-curve. The northbound and southbound routes are split in downtown Des Plaines between Lee Street (West 12/North 45) and Graceland Avenue (East 12/South 45). During this time, US 12/45 intersects with US 14 (Miner Street) at two separate points, due to the separation of their directions.

Just north of US 14, US 12/45 are reunited in both directions on Lee Street, only to be separated as US 12 diverges onto Rand Road and US 45 becomes Des Plaines River Road in a complicated intersection on the north side of Des Plaines, just south of Illinois Route 58.

US 45 continues along Des Plaines River Road, intersecting with Illinois 58 in Des Plaines, and eventually becomes concurrent with Illinois Route 21, Milwaukee Avenue, in Prospect Heights, until Lincolnshire (just north of Illinois Route 22) where US 45 takes a northwest route.

US 45 also intersects with Illinois Route 83 just south of Mundelein (where they exchange routes, as IL 83 goes northwest, and US 45 continues north), Illinois Route 60 in Mundelein, Illinois Route 137 in Libertyville, Illinois Route 120 in Grayslake, and Illinois Route 173 just south of the Wisconsin border.

Major intersections

McCrackenPaducah US 45 south PaducahContinuation into Kentucky
Ohio RiverBrookport Bridge
MassacMetropolis IL 145
I-24 Interstate 57, PaducahI-24 exit 37
IL 169 (Karnak Road)
JohnsonVienna IL 146 (Vine Street)
I-24 Interstate 57, PaducahI-24 exit 14
IL 166
SalineHarrisburg IL 145 south / IL 34 southSouthern end of IL 34 concurrency
IL 13 west / IL 34 westNorthern end of IL 34 concurrency
IL 13
Eldorado IL 142 (State Street)
county line
IL 141
WhiteNorris City IL 1
IL 14
WayneMill Shoals I-64 Mt. Vernon, EvansvilleI-64 exit 110
Fairfield IL 15 east (Main Street)Southern end of IL 15 concurrency
IL 15 westNorthern end of IL 15 concurrency
Clay US 50 eastSouthern end of US 50 concurrency
US 50 westNorthern end of US 50 concurrency
Effingham IL 37
Effingham US 40 west / IL 33 (Fayette Avenue)Southern end of US 40 concurrency
US 40 east / IL 33 (Fayette Avenue)Northern end of US 40 concurrency
I-57 / I-70 Chicago, Indianapolis, St. Louis, Memphis
Cumberland I-57 Urbana, Champaign, Mt. Vernon
IL 121 southSouthern end of IL 121 concurrency
ColesMattoon I-57 Urbana, Champaign, Effingham
IL 16 east (Charleston Avenue)Southern end of IL 16 concurrency
IL 16 west (Charleston Avenue)Northern end of IL 16 concurrency
IL 121 northNorthern end of IL 121 concurrency
DouglasArcola IL 133 (Springfield Road)
US 36 (Southline Road)
ChampaignPesotum I-57 Kankakee, Effingham
Champaign US 150 west (Springfield Avenue)Southern end of US 150 concurrency
Urbana US 150 east (University Avenue)Northern end of US 150 concurrency
I-74 Bloomington, DanvilleI-74 exit 184
Rantoul US 136 (Champaign Avenue)
FordPaxton IL 9 west (Patton Street)Southern end of IL 9 concurrency
IL 9 east (Pells Street)Northern end of IL 9 concurrency
IroquoisGilman US 24 westSouthern end of US 24 concurrency
US 24 eastNorthern end of US 24 concurrency
Ashkum IL 116 west
US 52 east / IL 49 southSouthern end of US 52 concurrency
KankakeeKankakee I-57 Chicago, Champaign, Urbana
IL 50 north (Schuyler Avenue)
IL 17 east (Court Street)Southern end of IL 17 concurrency
IL 17 west (Court Street)Northern end of IL 17 concurrency
Bourbonnais IL 102 west (Main Street Northwest)
Will US 52 west
Frankfort US 30 / Lincoln Highway
MokenaOrland Park
Tinley Park tripoint
I-80 Indiana, JolietI-80 exit 145
CookOrland Park US 6 (159th Street)
IL 7 (Southwest Highway)
IL 83 (Calumet Sag Road)Interchange
Oak Lawn US 12 east / US 20 east (95th Street)Southern end of US 12 & US 20 concurrency
Willow Springs I-294 south (Tri-State Tollway) / IL 171 (Archer Avenue) / to 79th StreetInterchange
Hodgkins I-55 (Stevenson Expressway) Chicago, St. LouisI-55 exit 279
Countryside Historic US 66 (Joliet Road, Will Rogers Highway)
La Grange US 34 (Ogden Avenue)
Westchester IL 38 west (Roosevelt Road)

I-290 / IL 110 (CKC) (Eisenhower Expressway) Chicago, Rockford
I-290 exit 17
Bellwood IL 56 west (Washington Boulevard)
Stone Park US 20 west (Lake Street)Northern end of US 20 concurrency
IL 64 (North Avenue)
Schiller Park IL 19 (Irving Park Road)
Chicago I-190 Chicago, O'Hare International AirportI-190 exit 2
Rosemont IL 72 (Higgins Road)
Des Plaines US 14 (Miner Street, Northwest Highway, Ronald Reagan Highway)
US 12 west (Rand Road)Northern end of US 12 concurrency
IL 58 (Golf Road)
Prospect Heights IL 21 south (Milwaukee Avenue)Southern end of IL 21 concurrency
Wheeling IL 68 (Dundee Road)
county line
Buffalo GroveWheeling lineLake Cook RoadInterchange
LakeHalf Day IL 22 (Half Day Road)
IL 21 north (Milwaukee Avenue)Northern end of IL 21 concurrency
Mundelein IL 83
IL 60 (Townline Road)
IL 176 (Maple Avenue)
Libertyville IL 137 (Buckley Road) Volo, North ChicagoInterchange
Lake Forest IL 120 (Belvidere Road)
Grandwood Park IL 132 (Grand Avenue)
Antioch IL 173
Kenosha US 45 north MilwaukeeContinuation into Wisconsin
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. 1 2 Illinois Technology Transfer Center (2007). "T2 GIS Data". Retrieved 2007-11-08.
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