U.S. Route 20 in Illinois

Route map:

U.S. Route 20 marker

U.S. Route 20

Ulysses S. Grant Memorial Highway
Map
US 20 highlighted in red
Route information
Maintained by IDOT and CDOT
Length233.93 mi (376.47 km)
Existed1926–present
Major junctions
West end US 20 in East Dubuque
Major intersections
East end US 12 / US 20 / US 41 in Chicago
Location
CountryUnited States
StateIllinois
CountiesJo Daviess, Stephenson, Winnebago, Boone, McHenry, Kane, DuPage, Cook
Highway system
IL 19 IL 21

U.S. Route 20 (US 20) in the U.S. state of Illinois is a major arterial highway that runs from the Iowa state line at East Dubuque at the northwestern tip of Illinois to the Indiana state line at Chicago south of the Chicago Skyway, a distance of 233.93 miles (376.47 km). For its entire length, US 20 is designated as the General Ulysses S. Grant Highway, often abbreviated the U.S. Grant Memorial Highway. However, this name is only commonly used west of Elgin. US 20 bypasses the city of Elgin on a freeway known as the Elgin Bypass or Dr. Martin Luther King Jr. Memorial Highway. From Elgin to Melrose Park, US 20 follows Lake Street. It then follows Mannheim Road and, further south, La Grange Road. US 20 also follows 95th Street as it turns east through Chicago's southwestern suburbs. It ultimately leaves Illinois on Indianapolis Boulevard.

Route description

Northwest Illinois

The US 20/IL 84 bridge over the Galena River in Galena

As the highway enters Illinois across the Julien Dubuque Bridge, it continues southeasterly for a while, paralleling the Upper Mississippi River before turning east into the rugged country of the Driftless Area in Jo Daviess County, then turning flat and straight west of Stockton and entering Stephenson County. The Ulysses S. Grant Home, a national landmark, fronts near the highway at the eastern edge of Galena.

The road between Dubuque and Stockton was once known as the most dangerous stretch of road because of the hills and curves flanked by cliffs and valleys. Travelers were greeted with signs reminding them to drive carefully as they entered this stretch of road.

In Freeport, US 20 is routed onto a limited-access freeway bypass. Between Freeport and Rockford, there are two traffic light-controlled intersections. The Rockford bypass routes US 20 onto a full limited-access freeway; it remains this way until it overlaps Interstate 39 (I-39) southeast of downtown Rockford.

Rockford to Elgin

East of Rockford, the routing of US 20 runs parallel with I-90; US 20 serves minor cities that are not accessible from the Jane Addams Memorial Tollway. It is a four-lane divided highway from I-39 to just east of Belvidere; for the rest of this segment, it is a winding, rural two-lane road.

US 20 travels through the downtowns of the small towns and unincorporated areas of Garden Prairie, Harmony and Starks, as well as the city of Marengo. At Starks, eastbound US 20 overlaps southbound Illinois Route 47 (IL 47) and westbound IL 72, forming a wrong-way concurrency. All three routes pass beneath a railroad viaduct before separating south of Starks.

Continuing east, US 20 travels through Pingree Grove before entering the Elgin area. Before entering Elgin, US 20 widens to a four lane limited-access freeway that bypasses Elgin, around the town's south end. This road is known as the Elgin Bypass.

Elgin to Indiana

Markers for the original Ulysses S. Grant Highway on Old Lake Street in Bartlett

At the end of the Elgin bypass, US 20 takes on the name of Lake Street. US 20 has numerous high-volume intersections, including a grade-separated interchange with IL 59. In Hanover Park, an early-2000s reconstruction project widened lanes on the road and created a median for safer travel; east of Barrington Road/County Farm Road, the road briefly becomes six lanes for one mile (1.6 km) until the Elgin–O'Hare Expressway.

US 20 continues in an east-southeast direction through the town center of Bloomingdale and becomes six lanes at the Bloomingdale–Roselle border. It maintains six lanes through a very high traffic corridor to I-290 and onward to IL 53 before it returns to four lanes while serving downtown Addison, paralleling I-290 to the north. Past Elmhurst, the road overlaps I-290 for a mile (1.6 km).

US 20 continues through Stone Park and Melrose Park before turning south and joining US 12/US 45 on Mannheim Road. In La Grange, the combined US 12, US 20, and US 45 traveling on La Grange Road intersect with Ogden Avenue, which carries US 34, one of the few places where four U.S. Numbered Highways intersect. La Grange Road continues south until US 20 turns onto 95th Street eastbound with US 12. This combination later joins with US 41, where the three routes follow Ewing Avenue and Indianapolis Boulevard, which are the last portions of US 20 prior to its crossing the state line into Indiana.

History

The routing of US 20 has not changed since 1938. Prior to 1938, US 20 continued east on Lake Street east of Mannheim Road (US 12/US 45). It ran through downtown Chicago and exited Chicago south on what is now Torrence Avenue. In 1955, the Illinois General Assembly designated the entire length of US 20 in Illinois the "U.S. Grant Memorial Highway". New signs were produced in late 2007 to reflect this designation along its entire length.

Elgin Bypass

Construction of the Golf Road (IL 58) extension to Summit Street in Elgin was completed in 1932. In 1958, I-90 was built through the north side of Elgin extending east to Devon Avenue and on to Chicago by 1960. In 1935, concerned about increasing numbers of traffic, residents of Elgin laid plans to build a bypass. US 20 had been routed down Villa Street, Highland Avenue, and Larkin Avenue through downtown Elgin. A section of freeway opened south of Elgin as the Elgin Bypass 27 years later.

The segment of the Elgin Bypass between McLean Boulevard and Grace Street (IL 25), including the Fox River bridge, was opened first. Later, the outer segments of the bypass—to Randall Road on the west and Bluff City Boulevard on the east—were opened. On November 30, 1962, Governor Otto Kerner Jr. dedicated the Elgin Bypass.

From 1962 until 1984, the old route was designated as US 20 Business (US 20 Bus.).

In 2012–2016, the interchange between the Elgin Bypass and McLean Boulevard was upgraded to a single-point urban interchange, the bridge was widened and replaced, and portions of the bypass were repaved at a cost of $44.4 million (equivalent to $49.7 million in 2021).

In 2019, the interchange between the Elgin Bypass and Randall Road received a $9-million (equivalent to $9.49 million in 2021) upgrade so that northbound Randall Road traffic can enter the eastbound Elgin Bypass without making a left turn at a traffic light.

Starting in 2014, a comprehensive study of the Elgin Bypass corridor resulted in a number of recommendations including a wider bridge across the Fox River, a replacement bridge for IL 31 crossing the bypass, and replacement of other bridges. The 2019 estimates of the recommended improvements total $84 million (equivalent to $88.5 million in 2021), with $10.6 million (equivalent to $11.2 million in 2021) designated for the IL 31 bridge.

Future

Long range plans call for US 20 to be upgraded to a four lane highway from Rockford to East Dubuque. The project dates back to the 1970s, when a major supplemental freeway system was proposed in Illinois. US 20 has been completed as a four lane freeway/expressway combination between Rockford and Freeport as well as Galena and East Dubuque. The remaining gap between Freeport and Galena is planned to be filled, but efforts have stalled in recent years, mainly due to funding issues.

Major intersections

All exits are unnumbered.

CountyLocationmikmDestinationsNotes
Mississippi River0.00.0


US 20 west / Great River Road (National Route) north – Dubuque
Continuation into Iowa
Iowa–Illinois state line (Julien Dubuque Bridge)
Jo DaviessEast Dubuque0.71.1
IL 35 north – Wisconsin
Interchange; southern terminus of IL 35; no eastbound entrance
Rawlins Township11.218.0
IL 84 north – Hazel Green
Western end of IL 84 overlap
Elizabeth Township26.442.5


IL 84 south / Great River Road (National Route) south (Washington Street) – Hanover, Savanna
Eastern end of IL 84/Great River Road overlap
Stockton41.767.1
IL 78 south (Main Street) – Mount Carroll
Western end of IL 78 overlap
StocktonWards Grove
township line
42.969.0
IL 78 north – Warren
Eastern end of IL 78 overlap
StephensonLena50.881.8 IL 73 – Lena, Pearl City
Freeport57.492.4

US 20 Bus. east – Freeport
Western terminus of US 20 Bus.; western end of expressway
61.899.5 IL 26 – Freeport, Monroe
65.0104.6 IL 75 – Freeport, Rockton
68.8110.7Springfield Road – FreeportEastbound exit and westbound entrance


US 20 Bus. west – Freeport
Westbound exit and eastbound entrance; eastern terminus of US 20 Bus.; eastern end of expressway
WinnebagoRockford85.9138.2

US 20 Bus. east (State Street)
Eastbound exit and westbound entrance; western terminus of US 20 Bus.; western end of freeway section
87.7141.1 CR 24 (Meridian Road)
90.1145.0 CR 27 (Montague Road)
92.7149.2 IL 2 (Main Street) – Dixon
94.6152.2 IL 251 (11th Street) – Rochelle
96.8155.8Alpine Road
97.3156.6

I-39 south / US 51 south – Bloomington, Normal
Western end of I-39/US 51 overlap
100.4161.6




I-39 Toll north / US 51 north to I-90 Toll (Jane Addams Memorial Tollway) / Harrison Avenue – Chicago, Wisconsin, Rockford
Cloverleaf interchange; eastern end of freeway section; eastern end of I-39/US 51 overlap; I-39 exit 122A
BooneBelvidere106.1170.8Appleton RoadInterchange
108.0173.8



US 20 Bus. west (Belvidere Road) to I-90 Toll (Genoa Road)
Eastern terminus of US 20 Bus.
McHenryMarengo119.2191.8
IL 23 (State Street) to IL 176 (Telegraph Street)
KaneHampshire128.0206.0
I-90 Toll (Jane Addams Memorial Tollway) – Chicago, Rockford
I-90 exit 42
Pingree Grove133.6215.0

IL 47 north / IL 72 east – West Dundee, Huntley
Western end of IL 47/IL 72 overlap
134.0215.7

IL 47 south / IL 72 west – Elburn, Hampshire
Eastern end of IL 47/IL 72 overlap
Elgin141.5227.7 CR 34 (Randall Road)Western end of Elgin Bypass freeway
141.6227.9Larkin AvenueEastbound exit and westbound entrance
143.0230.1McLean Boulevard
144.4232.4 IL 31 (State Street)
145.1233.5 IL 25Split into separate north and south exits westbound
Cook146.4235.6Villa StreetWestbound exit and eastbound entrance; eastern end of Elgin Bypass
Bartlett148.6239.1 IL 59 (Sutton Road) – Barrington, West ChicagoInterchange
DuPageCook
county line
Hanover Park151.9244.5
CR 43 south (County Farm Road), Barrington Road
Northern terminus of CR 43; County Farm Road continues north as Barrington Road
DuPage152.6245.6

IL 390 Toll east (Elgin–O'Hare Tollway)
I-Pass only; interchange; western terminus of IL 390
152.9246.1
CR 29 west (Greenbrook Boulevard)
Eastern terminus of CR 29
Roselle153.9247.7 CR 23 (Gary Avenue)
Bloomingdale156.2251.4 CR 4 (Bloomingdale Road)
Addison157.8254.0 CR 24 (Medinah Road)
158.6255.2
I-355 to I-290 – Joliet, Chicago, Rockford
I-355 exit 31
158.8255.6 IL 53 (Rohlwing Road)
161.4259.7
CR 22 north (Addison Road)
Southern terminus of CR 22
162.0260.7 CR 28 (Villa Avenue, Wood Dale Road)
AddisonElmhurst line162.6261.7


IL 64 Truck west / IL 83 (Kingery Highway) to I-290

CR 20 east (Grand Avenue)
Interchange; western end of IL 64 Truck overlap
Elmhurst163.8263.6York Road, North York StreetInterchange

I-290 west – Rockford
Western end of I-290 overlap; I-290 exit 12
164.8265.2



I-290 east to I-294 Toll south (Tri-State Tollway) – Chicago, Indiana
Eastern end of I-290 overlap; I-290 exit 13A; I-294 north exit 31
165.2265.9

IL 64 east (North Avenue) / IL 64 Truck end
Interchange; eastern end of IL 64 Truck overlap; eastbound left exit and westbound left entrance
CookNorthlake165.4266.2

I-294 Toll north (Tri-State Tollway) – Milwaukee, O'Hare
I-294 exit 33
Berkeley167.3269.2

US 12 west / US 45 north (Mannheim Road north)
Western end of US 12/US 45 overlap
BellwoodHillside line168.4271.0
IL 56 west (Washington Boulevard)
Eastern terminus of IL 56
HillsideWestchester line169.2272.3
I-290 / IL 110 (CKC) (Eisenhower Expressway)
I-290 exit 17
169.7273.1
IL 38 west (Roosevelt Road)
Eastern terminus of IL 38
La Grange172.9278.3 US 34 (Ogden Avenue)
CountrysideHodgkins line174.1280.2 Historic US 66 (Joliet Road)
176.8284.5


I-55 (Stevenson Expressway) to I-294 Toll north – Chicago, St. Louis
I-55 exit 279
Willow Springs178.1286.6


IL 171 (Archer Avenue) to 79th Street / I-294 Toll south (Tri-State Tollway) – Indiana
Cloverleaf interchange; left exit eastbound
Hickory Hills180.2290.0
US 45 south (La Grange Road south)
Eastern end of US 45 overlap
Bridgeview182.5293.7
I-294 Toll (Tri-State Tollway) – Wisconsin, Indiana
Tolled; I-294 exit 17
182.9294.3 IL 43 (Harlem Avenue)Cloverleaf interchange
Oak Lawn185.9299.2 IL 50 (Cicero Avenue)
Chicago191.0307.4



Halsted Street to I-57 / I-94 east / IL 1
192.0309.0
I-94 west (Dan Ryan Expressway)
I-94 exit 62
194.0312.2
Stony Island Avenue to I-94
Northern terminus of Stony Island Avenue expressway (southbound); at-grade street northbound
196.5316.2
US 41 north / LMCT (Ewing Avenue north)
Western end of US 41 overlap
197.9318.5


I-90 Toll west / Chicago Skyway west
Signed as "To I-90 west"; access to I-90 east is in Indiana; I-90 exit 107
198.0318.7


US 12 east / US 20 east / US 41 south / LMCT (Indianapolis Boulevard) – Hammond
Continuation into Indiana
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Business routes

US 20 has been rerouted around the cities of Freeport, Rockford, Elgin, and Chicago. A bypass is currently planned for Galena.

The longest US 20 Bus. in Illinois runs 21 miles (34 km) from just west of Rockford to just east of Belvidere. The route begins just west of Weldon Road and runs as State Street into downtown Rockford, where it is split into two one-way streets (Chestnut Street and Walnut Street for eastbound traffic and Jefferson Street for westbound traffic). The route continues east along State Street all the way through Rockford and becomes a two-lane highway between Rockford and Belvidere. US 20 Bus. is then routed in an outer loop around the city of Belvidere before merging back with US 20 near Genoa Road and I-90.

US 20 Bus. in Elgin was removed in 1984. This ran along Larkin Avenue, Highland Avenue, Chicago Street, and Villa Avenue. The current routing of US 20 south of Elgin is called the Elgin Bypass.

US 20 Bus. in Chicago was removed in 1968. This existed from 1960 through 1968; before then, it was US 20 City from 1938 to 1960.

See also


This page was last updated at 2023-10-09 02:22 UTC. Update now. View original page.

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