Interstate 55 in Illinois

Interstate 55 (I-55) is a major north–south Interstate Highway in the U.S. state of Illinois that connects the St. Louis, Missouri, and Chicago metropolitan areas. It enters the state from Missouri on the Poplar Street Bridge near East St. Louis and runs to U.S. Route 41 (US 41, Lake Shore Drive) near downtown Chicago where the highway ends, a distance of 294.38 miles (473.76 km).[2] The Road also runs through the cities of Springfield, Bloomington, and Joliet. The section in DuPage County is officially named Joliet Freeway or Will Rogers Freeway and in Cook County is officially named the Stevenson Expressway.

Interstate 55
I-55 highlighted in red
Route information
Maintained by IDOT
Length294.38 mi[1] (473.76 km)
Major junctions
South end I-55 / I-64 / US 40 at East St. Louis
North end US 41 in Chicago
CountiesSt. Clair, Madison, Macoupin, Montgomery, Sangamon, Logan, McLean, Livingston, Grundy, Will, DuPage, Cook
Highway system
IL 54IL 56

Route description

I-55 within Illinois carries heavy traffic, with an average of more than 20,000 vehicles per day for most of its length.[3] Significant portions of I-55 contain six lanes (three lanes in each direction) and are heavily used by commuters.[4] I-55 in Illinois begins in East St. Louis on the Poplar Street Bridge over the Mississippi River at the Missouri–Illinois state line[4] and runs southwest to northeast through the state, ending in Chicago at US 41 (Lake Shore Drive). Along the way, it goes through four metropolitan areas in the state: the Illinois portion of the St. Louis metropolitan area, the Springfield metropolitan area, the Bloomington-Normal metropolitan area, and the Chicago metropolitan area (also known as Chicagoland).[4]

I-55 enters the Chicago metro area as the Stevenson Expressway and provides easy access to downtown Chicago via both the I-90/I-94 (Dan Ryan Expressway) interchange and US 41 (Lake Shore Drive) at the northern terminus of I-55, near Cermak Road and the lakefront.


I-55 in Illinois is the fourth road to connect St. Louis and Chicago. The first was the Pontiac Trail in 1915. This was largely improved and paved as the new Illinois Route 4 (IL 4) by 1924.[5] In 1926, IL 4 was designated as the route of the new U.S 66, and a new section of US 66 was built to bypass slower sections of IL 4 south of Springfield by 1930. Through the 1950s US 66 was continually widened, straightened, and improved to handle its growing traffic, until its entire length was four lanes wide by 1957.[6]

The roots of I-55 could be traced back to the need of a national highway system.[7] President Dwight D. Eisenhower saw the need of a national network of highways that would help with the mobilization of the army. He had been impressed with the autobahn he saw in Germany during World War II. In 1956 he signed the Federal Aid Highway Act into existence.[7] Although the act provided for a highway replacing Route 66, it was spared destruction for a while because of it being more modern than other routes at the time.[7] Illinois would build its first new Interstate highways on other routes such as I-80, I-57, and I-70, before turning its attention once again to the St. Louis-to-Chicago route.

However, during the 1970s, Route 66 was finally replaced by I-55 as the fourth St. Louis-to-Chicago highway, serving most of the same communities along the way as the original Pontiac Trail. It was built in sections across Illinois, often on the original Route 66 roadbed. A common construction tactic where Route 66 was already four lanes wide, was to build new southbound lanes for I-55 west of the original road, then rebuild the original southbound lanes of US 66 to be the new northbound lanes for I-55, leaving the original northbound lanes of old US 66 as a two-way frontage road.[7] One can find many signs posted for Historic US 66, especially where it deviates from I-55.

The earliest stretch of I-55 was a portion of US 66 which had already been built as a freeway between Gardner and I-294 (Tri-State Tollway) in Indian Head Park, and which was added to the Interstate system by simply erecting new signs in 1960.[8] Later portions of the highway were built in the 1960s between East St. Louis and Hamel, as bypasses of Springfield and Bloomington-Normal.[9] The rest of the road was completed in the 1970s.

The Stevenson Expressway opened on October 24, 1964 as the Southwest Expressway. It was renamed after Adlai Stevenson,[10] the former governor of Illinois, on September 1, 1965, a month and a half after his death. The Stevenson's original termini were US 66 in DuPage County to the west, and the Dan Ryan Expressway to the east.

In 1999–2000, the expressway was completely rebuilt from Central Avenue north to Lake Shore Drive, including the ramps to the Dan Ryan. The Illinois Department of Transportation (IDOT) was criticized at the time for not adding a fourth lane in each direction to the highway.[11]

In 2017, the Illinois General Assembly voted to rename approximately 70 miles (110 km) of I-55 from the Tri-State Tollway (I-294) to Pontiac in honor of Barack Obama.[12][13]

Upgrades and current construction

Because of the heavy traffic on I-55, IDOT spends millions of dollars per year maintaining the roadway, adding lanes, and replacing bridges to increase the capacity of the highway.[14][15]

In northeastern Illinois near Joliet, a widening project that expanded I-55 from two to three lanes in each direction between I-80 (exit 250) and Weber Road (exit 263) was completed on October 29, 2008.[16]

In the 2000s decade, the Damen Avenue (exit 290) and Pulaski Road (exit 287) interchanges were rebuilt as a single-point urban interchange (SPUI) configuration; in 2014 reconstruction as a SPUI was completed for the Central Avenue (exit 285) interchange. The Arsenal Road (exit 245) interchange was under complete rebuilding and reconfiguration as of 2012, and the deteriorated overpass at IL 129 (exit 238) was removed in 2012 in anticipation of future construction of a full interchange, temporarily leaving the IL 129 interchange with only a northbound exit and northbound entrance.[17][18]

At St. Louis, the Stan Musial Veterans Memorial Bridge carrying I-70 across the Mississippi River, and costing $667 million, was completed in 2014 to relieve congestion on I-55's Poplar Street Bridge.[19][20]


Governor Bruce Rauner, in early 2016, made a proposal to explore expanding the Stevenson Expressway portion of I-55 by adding an additional lane in each direction to ease congestion. Under his proposal, toll lanes would be constructed and operated through a potential private-public partnership.[21]

Exit list

Mississippi River0.000.00 I-55 south / I-64 west / US 40 west St. LouisContinuation into Missouri
Poplar Street Bridge
St. ClairEast St. Louis0.631.01 IL 3 south (Mississippi Avenue) / Great River Road south Cahokia, SaugetSouthern end of IL 3/GRR concurrency
0.901.45Tudor AvenueEntrance ramp from Piggott Avenue
1.302.091 IL 15 east (Barack Obama Avenue) / 13th Street, Tudor Avenue East St. Louis Business DistrictNorthbound exit and southbound entrance; to Broadway Avenue
1.802.902AThird Street – Eads BridgeSouthbound exit and northbound entrance
1.913.072B-CMartin Luther King Bridge Downtown St. LouisSouthbound exit and northbound entrance; left exit is signed as exit 2B and right exit as 2C
2.674.303A I-64 east / IL 3 north to St. Clair Avenue LouisvilleNorthern end of I-64/IL 3 concurrency
2.884.633B I-70 west Kansas CitySouthern end of I-70 concurrency; southbound exit and northbound entrance
2.984.803CExchange AvenueSouthbound exit and northbound entrance
Madison3.996.424 IL 203 (Collinsville Road) Fairmont City, Granite City, MadisonSigned as exits 4A (south) & 4B (north) southbound
Fairmont City6.3210.176 IL 111 / Great River Road north Wood River, Washington ParkNorthern end of GRR concurrency
Collinsville8.8414.239Black LaneNorthbound exit and southbound entrance
9.8615.8710 I-255 – Interstate 270, MemphisI-255 exit 25
11.0017.7011 IL 157 (Bluff Road) Collinsville, Edwardsville
Maryville14.5523.4215 IL 159 (Center Street / Morrison Avenue) Collinsville, MaryvilleSigned as exits 15A (south) & 15B (north)
Troy16.9127.2117 US 40 east St. Jacob, HighlandNorthern end of US 40 concurrency
17.9128.8218 IL 162 (Edwardsville Road) Troy
19.0830.7120A I-70 east IndianapolisNorthern end of I-70 concurrency
19.3231.0920B I-270 west Kansas CityI-270 exit 15
Edwardsville22.3936.0323 IL 143 Edwardsville, Marine
Hamel29.5747.5930 IL 140 Alton, Greenville, Hamel
33.1553.3533 IL 4 Staunton, Lebanon, Worden
Livingston36.7159.0837New Douglas Road / Nicholls Street – Livingston, New Douglas
Macoupin40.4765.1341Staunton Road – Staunton
White City44.0570.8944 IL 138 Mount Olive, Benld, White City
MontgomeryLitchfield52.3584.2552 IL 16 Gillespie, Litchfield, Hillsboro, Mattoon
59.9896.5360 IL 108 west CarlinvilleEastern terminus of IL 108
63.02101.4263 IL 48 north / IL 127 south (North 22nd Avenue) Raymond, Taylorville, HillsboroSouthern terminus of IL 48; northern terminus of IL 127
Farmersville71.51115.0872 CR 17 (Mine Avenue, Main Street) Farmersville, Girard
SangamonDivernon80.00128.7580 Historic US 66 west (Divernon Road / Brown Street) DivernonSouthern end of Historic US 66 concurrency
81.53131.2182 Historic US 66 east / IL 104 Pawnee, AuburnNorthern end of Historic US 66 concurrency
83.35134.1483Old Route 66 – Glenarm
Springfield88.26142.0488 Historic US 66 west (East Lake Drive / Palm Road) ChathamSouthern end of Historic US 66 concurrency
90.16145.1090Toronto Road
91.84147.8092A Historic US 66 east / I-55 Bus. north (6th Street) Springfield, Southern ViewLeft exit northbound; northern end of Historic US 66 concurrency
92.28148.5192B I-72 west / US 36 west Jacksonville, QuincySouthern end of I-72/US 36 concurrency; left exit northbound
94.42151.9594Stevenson Drive, East Lake Drive
96.37155.0996 IL 29 (South Grand Avenue) Taylorville, Rochester, EdinburgSigned as exits 96A (south) & 96B (north)
97.47156.8698A I-72 east / US 36 east Decatur, Champaign, UrbanaNorthern end of I-72/US 36 concurrency
98B IL 97 west (Clear Lake Avenue)Downtown Springfield
99.53160.18100 IL 54 east (Sangamon Avenue) Clinton, Spaulding, Mount PulaskiSigned as exits 100A (IL 54 east) & 100B (Sangamon Avenue); Illinois State Fairgrounds
Sherman104.50168.18105 Historic US 66 west / I-55 Bus. south (Sherman Boulevard) to IL 4 (Veterans Parkway) Springfield, ShermanAbraham Lincoln Capital Airport; southern end of Historic US 66 concurrency
Williamsville109.13175.63109 Historic US 66 east / IL 123 Williamsville, Petersburg, AthensNorthern end of Historic US 66 concurrency
LoganElkhart114.56184.37115CR 700 North / Kennedy Road – Elkhart, Mount Pulaski
119.42192.19119CR 800 East – Broadwell
122.51197.16123 I-55 Bus. north Lincoln
Lincoln125.78202.42126 IL 10 / IL 121 south (Woodlawn Road) Lincoln, Decatur, Mason CityNorthern terminus of IL 121
127.04204.45127 I-155 north Peoria, HartsburgSouthern terminus of I-155, I-155 exit 0
132.21212.77133 Historic US 66 / I-55 Bus. south Lincoln, Lawndale
139.81225.00140South Street / 2350th Street – Atlanta, Lawndale, Waynesville
McLean144.68232.84145 US 136 McLean, Heyworth, Funks Grove
153.74247.42154850 North Road – Shirley, Funks Grove
157A I-74 east / US 51 south Indianapolis, DecaturSouthern end of I-74/US 51 concurrency
Bloomington157B I-55 Bus. north (Veterans Parkway) Central Illinois Regional AirportSigned as exit 134B southbound
159.69257.00160 US 150 / IL 9 (Market Street) Pekin
163.32262.84163 I-74 west PeoriaNorthern end of I-74 concurrency; I-74 exit 127
164.48264.70164 I-39 north / US 51 north RockfordNorthern end of US 51 concurrency; southern terminus of I-39
US 51 Bus. Bloomington, Normal
Signed as exits 165A (south) & 165B (north) northbound
167.36269.34167 I-55 Bus. south (Veterans Parkway) Central Illinois Regional Airport
170.99275.18171 CR 29 Towanda
Lexington178.29286.93178 CR 8 (PJ Keller Highway) Lexington
Chenoa186.60300.30187 US 24 Chenoa, El Paso
Livingston196.62316.43197 IL 116 Flanagan, Pontiac
200.46322.61201 IL 23 Pontiac, StreatorTo IL 170
209.03336.40209 CR 1 Odell
Dwight217.02349.26217 IL 17 (Mazon Avenue) Streator, Kankakee
Grundy219.91353.91220 IL 47 (Union Street) Dwight, Morris
226.88365.13227 CR 29 / CR 49 (Gardner Road, Main Road) to IL 53 Gardner
county line
233.42375.65233Reed Road – Braidwood
Will235.63379.21236 IL 113 (Division Street/Johnson Road) to IL 129 Kankakee, Coal City, Braidwood, Diamond
238.32383.54238 IL 129 south Braidwood, WilmingtonNorthbound exit and entrance; northern terminus of IL 129
240.41386.90240Lorenzo Road
240.97387.80241 CR 44 east (North River Road)
243.91392.54244 CR 17 east (Arsenal Road)Chicagoland Speedway
246.67396.98247 CR 77 west (Bluff Road)
Channahon248.15399.36248 US 6 (Eames Street) Joliet, Morris
250.25402.74250 I-80 Iowa, IndianaSigned as exits 250A (east) & 250B (west); I-80 exit 126
Shorewood251.40404.59251 IL 59 north (Cottage Street) Shorewood, PlainfieldNorthbound exit and southbound entrance; southern terminus of IL 59
city line
252.79406.83253 US 52 (Jefferson Street) Joliet, Shorewood
city line
257.41414.26257 US 30 / Lincoln Highway (Plainfield Road) Aurora, Joliet
Plainfield261.08420.17261 IL 126 west (Main Street) PlainfieldSouthbound exit and northbound entrance; eastern terminus of IL 126
city line
263.43423.95263 CR 88 (Weber Road)
Bolingbrook267.02429.73267 IL 53 (Bolingbrook Drive) Bolingbrook, Romeoville
268.73432.48268 Historic US 66 west (Joliet Road)Southbound exit and northbound entrance; southern end of Historic US 66 concurrency
I-355 (Veterans Memorial Tollway) – Southwest Suburbs, Northwest Suburbs
I-355 exit 12
DuPageDarien270.85435.89271 CR 9 (Lemont Road)Signed as exits 271A (south) & 271B (north)
272.86439.13273 CR 15 (Cass Avenue)Signed as exits 273A (south) & 273B (north); Argonne National Laboratory
WillowbrookBurr Ridge
city line
274.50441.76274 IL 83 (Kingery Highway)
county line
Burr Ridge276.33444.71276A-BCounty Line RoadSigned as exits 276A (south) & 276B (north)
CookIndian Head Park276.80445.47276C Historic US 66 east (Joliet Road)Northbound exit and southbound entrance; northern end of Historic US 66 concurrency; southern terminus of Stevenson Expressway
Indian Head ParkCountryside
city line
I-294 (Tri-State Tollway) Wisconsin, Indiana
Signed as exits 277A (north) & 277B (south); I-294 exit 23; no southbound access to I-294 south
city line
US 12 / US 20 / US 45 (La Grange Road) to I-294 south
Signed as exits 279A (east/south) & 279B (west/north)
Summit282.29454.30282 IL 171 (1st Avenue)Signed as exits 282A (south) & 282B (north) northbound; Brookfield Zoo
city line
283.40456.09283 IL 43 (Harlem Avenue (7200 West))
Chicago285.57459.58285Central Avenue (5600 West)
286.67461.35286 IL 50 (Cicero Avenue (4800 West)) Chicago Midway Airport
287.74463.07287Pulaski Road (4000 West)
288.83464.83288Kedzie Avenue (3200 West)Southbound exit and northbound entrance
289.37465.70289California Avenue (2800 West)Northbound exit and southbound entrance
290.44467.42290Damen Avenue (2000 West)
290.96468.25290Ashland Avenue (1600 West)Northbound exit and southbound entrance
292.34470.48292 I-90 / I-94 (Dan Ryan Expressway) Indiana, WisconsinSigned as exits 292A (west) & 292B (east) northbound, and as exits 292 (west) & 293B (east) southbound
292.91471.39293ACermak RoadChinatown (2200 South)Northbound exit and southbound entrance
293.13471.75293CState Street (0 East/West)Southbound exit and northbound entrance
293.61472.52293DMartin L. King Drive (400 East)Northbound exit and southbound entrance
293.88472.95 US 41 / LMCT (Lake Shore Drive)Northern terminus of I-55; northern terminus of Stevenson Expressway; all trucks must exit onto US 41 south
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Auxiliary routes

I-55 has three auxiliary routes in Illinois:

  • I-155: A spur from I-55 in Lincoln to I-74 just east of Peoria.
  • I-255: The eastern third of the beltway around the St. Louis Metro Area (with I-270 forming the other two-thirds)
  • I-355: The Veterans Memorial Tollway, serving the western and southwestern suburbs of Chicago, running from I-80 in New Lenox to I-290 in Addison

Springfield business loop

Interstate 55 Business

Business Loop 55 refers to a major arterial surface street that serves downtown Springfield, Illinois. It runs north from the intersection of Interstates 55 and Interstate 72 through downtown to Illinois Route 4 (Veterans' Parkway). It then runs northeast to Sherman.[23]

All of Business Loop 55 was part of U.S. Route 66 at some point.

Major junctions
The entire route is in Sangamon County.

I-55 / I-72 / US 36 Jacksonville, Decatur, Chicago, St. LouisExit 92A (I-55), Exit 97B (I-72)
4.97.9 IL 97 north (Jefferson Street)
5.08.0 IL 97 south (Madison Street)
7.011.3 IL 29 (Sangamon Avenue)Southern end of IL 29 concurrency
8.012.9 IL 4 south / IL 29 north (Veterans Parkway) Abraham Lincoln Capital AirportNorthern end of IL 29 concurrency, northern terminus of IL 4
Sherman12.119.5 IL 124 west (Andrew Road) Andrew, AthensEastern terminus of IL 124
12.720.4 I-55 south SpringfieldExit 105 (I-55), no access to I-55 northbound from this point
Williams Township13.922.4 I-55 north ChicagoOnly access to I-55 northbound
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Lincoln business loop

Interstate 55 Business

The Lincoln business route services the downtown of Lincoln, Illinois. It begins southwest of Lincoln and follows the former US 66 to Fifth Street. It then turns east on Fifth Street, southeast on Clinton Street, and northeast on Kickapoo Street at the city's center. The route continues northeast to rejoin the former routing of US 66 northeast of town near the Logan County Airport, at which point it continues along that route to end at I-55 further northeast of Lincoln.

Bloomington–Normal business loop

Interstate 55 Business

The routing of the Bloomington-Normal business loop is known for its entire length as Veterans Parkway. It is a divided, limited-access highway bypassing the Bloomington-Normal area to the south and east. The route's north-south portion largely passes through a retail core, including Eastland Mall and The Shoppes at College Hills. The is also the recommended route from I-39, I-55 and I-74 to Central Illinois Regional Airport via IL 9.

Major junctions
The entire route is in McLean County.

Bloomington I-55 / I-74 / US 51 Springfield, Decatur, Champaign, Rockford, Joliet, PeoriaExit 157 on I-55; exit 134 on westbound I-74
Historic US 66 west (Hamilton Road)Western end of Historic Route 66 concurrency

US 51 Bus. (Main Street) / Historic US 66 east
Diamond interchange, eastern end of Historic US 66 concurrency
US 150 (Morrisey Drive)
IL 9 (Empire Street) Pekin, Gibson CityCentral Illinois Regional Airport
Normal Historic US 66 (Shelbourne Drive) NormalSouthbound exit only
I-55 Joliet, SpringfieldI-55 exit 167; road continues to the north as Pipeline Road
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. Adderly, Kevin (October 31, 2002). "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Retrieved December 30, 2013.
  2. MapPoint (Map). Microsoft. 2002.
  3. 2011 Average Daily Total Traffic (PDF) (Map). Scale not given. Cartography by Office of Planning and Programming. Illinois Department of Transportation. 2011. Retrieved December 30, 2013.
  4. "I-55". Illinois Highway Ends. Self-published. Retrieved January 28, 2013.
  5. Illinois Official Auto Trails Map (Map). c. 1:950,000 and c. 1:1,110,000. Illinois Automobile Department. 1924. Retrieved December 30, 2013.
  6. Illinois Official Highway Map (Map). 1:805,000. Cartography by H.M. Gousha. Illinois Division of Highways. 1957. Retrieved December 30, 2013.
  7. Stork, Peter (2008). "History: Alignments and Bypasses". Digital Route 66. Archived from the original on May 11, 2008.
  8. Illinois Official Highway Map (Map). 1:790,000. Cartography by H.M. Gousha. Illinois Division of Highways. 1960. Retrieved December 30, 2013.
  9. Illinois Official Highway Map (Map). 1:772,500. Cartography by Rand McNally. Illinois Division of Highways. 1969. Retrieved December 30, 2013.
  10. Municipal Reference Collection (August 1997). "1964 Southwest Expressway Opened September 1, 1965—Renamed Adlai E. Stevenson Expressway". Chicago Public Library. Archived from the original on December 13, 2007.
  11. Hilkevitch, John (March 26, 2006). "Buckle Up, It Looks like a Long Ride". Chicago Tribune. Retrieved March 26, 2006.
  12. "Section of I-55 to Be Named After Former President Obama". Chicago: WLS-TV. July 4, 2017. Retrieved September 25, 2017.
  13. Malagon, Elvia (July 3, 2018). "Why There Was No Pomp, Circumstance or Former President When Obama Expressway Signs Went Up on I-55". Chicago Tribune. Retrieved July 4, 2018.
  14. "I-55 Resurfacing Work". The Herald News. Joliet, IL. May 24, 2002.
  15. Cain, Cindy Wojdyla (April 22, 2005). "Interstate Overhaul 55 and 80: 'Tight Cloverleaf' to Be Redone Starting in May". The Herald News. Joliet, IL.
  16. "Governor Blagojevich Announces Completion of Interstate 55 Widening Project: I-55 Corridor Improvement Project Added One Lane in Each Direction from Weber Rd to I-80; Goal Is to Increase Safety and Reduce Congestion" (Press release). Office of the Governor. October 29, 2008. Retrieved December 30, 2013.
  17. "Southbound I-55 Ramp Closure in Wilmington" (PDF) (Press release). Illinois Department of Transportation. Retrieved February 11, 2013.
  18. "I-55 Wilmington Study". Illinois Department of Transportation. Archived from the original on June 4, 2013. Retrieved February 11, 2013.
  19. "New Bridge May Mean Tolls on All Mississippi Bridges Here Making Motorists Pay Is a Last Resort But a Possibility, Officials Say". St. Louis Post-Dispatch. October 6, 1999.
  20. "New Mississippi River Bridge Opens to Traffic". St. Louis Post-Dispatch. February 9, 2014.
  21. "Gov. Rauner Pushes to Develop Toll Lanes on I-55". Chicago: WMAQ-TV. February 4, 2016. Retrieved February 4, 2016.
  22. Illinois Technology Transfer Center (2006). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
  23. General Highway Map: Sangamon County, Illinois (PDF) (Map). Illinois Department of Transportation. February 20, 2009. Retrieved January 2, 2013.
  24. Google (January 2, 2013). "Interstate 55 Business (Springfield)" (Map). Google Maps. Google. Retrieved January 2, 2013.

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