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
Length	294.38 mi[1] (473.76 km)
Major junctions
South end	I-55 / I-64 / US 40 at East St. Louis
	I-64 / I-70 / IL 3 in East St. Louis I-70 / I-270 / US 40 in Troy I-72 / US 36 / I-55 BL in Springfield I-155 near Lincoln I-74 in Bloomington I-39 / US 51 in Normal I-80 in Joliet I-355 in Bolingbrook I-294 in Indian Head Park I-90 / I-94 in Chicago
North end	US 41 in Chicago
Location
Counties	St. Clair, Madison, Macoupin, Montgomery, Sangamon, Logan, McLean, Livingston, Grundy, Will, DuPage, Cook
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate U.S. State Tollways ← IL 54 → IL 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.

History

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 near Countryside, heading southwest

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 later 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. In November 2011, IDOT started a two-year pilot project, allowing Pace bus routes 755 and 855 to ride on the dedicated shoulder lanes in a given time. This bus on shoulder service consisted of three sections: from I-355 to County Line Road, I-294 to IL 50, and IL 50 to Kedzie Avenue.[17] In fall of 2014, then-Governor Pat Quinn signed a bill which made the I-55 bus on shoulder service permanent. It also allow Pace to expand its bus on shoulder service within and outside I-55.[18] 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.[19][20]

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.[21][22]

Between the fall of 2015 and the winter of 2017, the US 41 (Lake Shore Drive) interchange was being reconstructed to widen two I-55 off-ramps and its interchange approach.[23]

Future

In early 2016, Governor Bruce Rauner, as well as IDOT, made a proposal to explore expanding a portion of I-55 (from I-355 to I-90/94) by adding an additional lane in each direction to ease congestion. Under their proposal, toll lanes would be constructed and operated through a potential private-public partnership. Noise walls would also be constructed as part of the project.[24][25][26]

Exit list

County	Location	mi[27]	km	Exit	Destinations	Notes
Mississippi River		0.00	0.00		I-55 south / I-64 west / US 40 west – St. Louis	Continuation into Missouri
				Poplar Street Bridge
St. Clair	East St. Louis	0.63	1.01		IL 3 south (Mississippi Avenue) / Great River Road south – Cahokia, Sauget	Southern end of IL 3/GRR concurrency
		0.90	1.45		Tudor Avenue	Entrance ramp from Piggott Avenue
		1.30	2.09	1	IL 15 east (Barack Obama Avenue) / 13th Street, Tudor Avenue – East St. Louis Business District	Northbound exit and southbound entrance; to Broadway Avenue
		1.80	2.90	2A	Third Street – Eads Bridge	Southbound exit and northbound entrance
		1.91	3.07	2B-C	Martin Luther King Bridge – Downtown St. Louis	Southbound exit and northbound entrance; left exit is signed as exit 2B and right exit as 2C
		2.67	4.30	3A	I-64 east / IL 3 north to St. Clair Avenue – Louisville	Northern end of I-64/IL 3 concurrency
		2.88	4.63	3B	I-70 west – Kansas City	Southern end of I-70 concurrency; southbound exit and northbound entrance
		2.98	4.80	3C	Exchange Avenue	Southbound exit and northbound entrance
Madison	​	3.99	6.42	4	IL 203 (Collinsville Road) – Fairmont City, Granite City, Madison	Signed as exits 4A (south) & 4B (north) southbound
	Fairmont City	6.32	10.17	6	IL 111 / Great River Road north – Wood River, Washington Park	Northern end of GRR concurrency
	Collinsville	8.84	14.23	9	Black Lane	Northbound exit and southbound entrance
		9.86	15.87	10	I-255 – Interstate 270, Memphis	I-255 exit 25
		11.00	17.70	11	IL 157 (Bluff Road) – Collinsville, Edwardsville
	Maryville	14.55	23.42	15	IL 159 (Center Street / Morrison Avenue) – Collinsville, Maryville	Signed as exits 15A (south) & 15B (north)
	Troy	16.91	27.21	17	US 40 east – St. Jacob, Highland	Northern end of US 40 concurrency
		17.91	28.82	18	IL 162 (Edwardsville Road) – Troy
	​	19.08	30.71	20A	I-70 east – Indianapolis	Northern end of I-70 concurrency
	​	19.32	31.09	20B	I-270 west – Kansas City	I-270 exit 15
	Edwardsville	22.39	36.03	23	IL 143 – Edwardsville, Marine
	Hamel	29.57	47.59	30	IL 140 – Alton, Greenville, Hamel
	​	33.15	53.35	33	IL 4 – Staunton, Lebanon, Worden
	Livingston	36.71	59.08	37	New Douglas Road / Nicholls Street – Livingston, New Douglas
Macoupin	​	40.47	65.13	41	Staunton Road – Staunton
	White City	44.05	70.89	44	IL 138 – Mount Olive, Benld, White City
Montgomery	Litchfield	52.35	84.25	52	IL 16 – Gillespie, Litchfield, Hillsboro, Mattoon
	​	59.98	96.53	60	IL 108 west – Carlinville	Eastern terminus of IL 108
	​	63.02	101.42	63	IL 48 north / IL 127 south (North 22nd Avenue) – Raymond, Taylorville, Hillsboro	Southern terminus of IL 48; northern terminus of IL 127
	Farmersville	71.51	115.08	72	CR 17 (Mine Avenue, Main Street) – Farmersville, Girard
Sangamon	Divernon	80.00	128.75	80	Historic US 66 west (Divernon Road / Brown Street) – Divernon	Southern end of Historic US 66 concurrency
	​	81.53	131.21	82	Historic US 66 east / IL 104 – Pawnee, Auburn	Northern end of Historic US 66 concurrency
	​	83.35	134.14	83	Old Route 66 – Glenarm
	Springfield	88.26	142.04	88	Historic US 66 west (East Lake Drive / Palm Road) – Chatham	Southern end of Historic US 66 concurrency
		90.16	145.10	90	Toronto Road
		91.84	147.80	92A	Historic US 66 east / I-55 BL north (6th Street) – Springfield, Southern View	Left exit northbound; northern end of Historic US 66 concurrency
		92.28	148.51	92B	I-72 west / US 36 west – Jacksonville, Quincy	Southern end of I-72/US 36 concurrency; left exit northbound
		94.42	151.95	94	Stevenson Drive, East Lake Drive
		96.37	155.09	96	IL 29 (South Grand Avenue) – Taylorville, Rochester, Edinburg	Signed as exits 96A (south) & 96B (north)
		97.47	156.86	98A	I-72 east / US 36 east – Decatur, Champaign, Urbana	Northern end of I-72/US 36 concurrency
				98B	IL 97 west (Clear Lake Avenue)	Downtown Springfield
		99.53	160.18	100	IL 54 east (Sangamon Avenue) – Clinton, Spaulding, Mount Pulaski	Signed as exits 100A (IL 54 east) & 100B (Sangamon Avenue); Illinois State Fairgrounds
	Sherman	104.50	168.18	105	Historic US 66 west / I-55 BL south (Sherman Boulevard) to IL 4 (Veterans Parkway) – Springfield, Sherman	Abraham Lincoln Capital Airport; southern end of Historic US 66 concurrency
	Williamsville	109.13	175.63	109	Historic US 66 east / IL 123 – Williamsville, Petersburg, Athens	Northern end of Historic US 66 concurrency
Logan	Elkhart	114.56	184.37	115	CR 700 North / Kennedy Road – Elkhart, Mount Pulaski
	​	119.42	192.19	119	CR 12 – Broadwell
	​	122.51	197.16	123	I-55 BL north – Lincoln
	Lincoln	125.78	202.42	126	IL 10 / IL 121 south (Woodlawn Road) – Lincoln, Decatur, Mason City	Northern terminus of IL 121
	​	127.04	204.45	127	I-155 north – Peoria, Hartsburg	Southern terminus of I-155, I-155 exit 0
	​	132.21	212.77	133	Historic US 66 / I-55 BL south – Lincoln, Lawndale
	​	139.81	225.00	140	South Street / 2350th Street – Atlanta, Lawndale, Waynesville
McLean	​	144.68	232.84	145	US 136 – McLean, Heyworth, Funks Grove
	​	153.74	247.42	154	850 North Road – Shirley, Funks Grove
	​	156.38– 156.85	251.67– 252.43	157A	I-74 east / US 51 south – Indianapolis, Decatur	Southern end of I-74/US 51 concurrency
	Bloomington			157B	I-55 BL north (Veterans Parkway) – Central Illinois Regional Airport	Signed as exit 134B southbound
		159.69	257.00	160	US 150 / IL 9 (Market Street) – Pekin
	​	163.32	262.84	163	I-74 west – Peoria	Northern end of I-74 concurrency; I-74 exit 127
	​	164.48	264.70	164	I-39 north / US 51 north – Rockford	Northern end of US 51 concurrency; southern terminus of I-39
	Normal	164.81	265.24	165	US 51 Bus. – Bloomington, Normal	Signed as exits 165A (south) & 165B (north) northbound
		167.36	269.34	167	I-55 BL south (Veterans Parkway) – Central Illinois Regional Airport
	​	170.99	275.18	171	CR 29 – Towanda
	Lexington	178.29	286.93	178	CR 8 (PJ Keller Highway) – Lexington
	Chenoa	186.60	300.30	187	US 24 – Chenoa, El Paso
Livingston	​	196.62	316.43	197	IL 116 – Flanagan, Pontiac
	​	200.46	322.61	201	IL 23 – Pontiac, Streator	To IL 170
	​	209.03	336.40	209	CR 1 – Odell
	Dwight	217.02	349.26	217	IL 17 (Mazon Avenue) – Streator, Kankakee
Grundy	​	219.91	353.91	220	IL 47 (Union Street) – Dwight, Morris
	​	226.88	365.13	227	CR 29 / CR 49 (Gardner Road, Main Road) to IL 53 – Gardner
Grundy–Will county line	​	233.42	375.65	233	Reed Road – Braidwood
Will	​	235.63	379.21	236	IL 113 (Division Street/Johnson Road) to IL 129 – Kankakee, Coal City, Braidwood, Diamond
	​	238.32	383.54	238	IL 129 south – Braidwood, Wilmington	Northbound exit and entrance; northern terminus of IL 129
	​	240.41	386.90	240	Lorenzo Road
	​	240.97	387.80	241	CR 44 east (North River Road)
	​	243.91	392.54	244	CR 17 east (Arsenal Road)	Chicagoland Speedway
	​	246.67	396.98	247	CR 77 west (Bluff Road)
	Channahon	248.15	399.36	248	US 6 (Eames Street) – Joliet, Morris
		250.25	402.74	250	I-80 – Iowa, Indiana	Signed as exits 250A (east) & 250B (west); I-80 exit 126
	Shorewood	251.40	404.59	251	IL 59 north (Cottage Street) – Shorewood, Plainfield	Northbound exit and southbound entrance; southern terminus of IL 59
	Shorewood–Joliet city line	252.79	406.83	253	US 52 (Jefferson Street) – Joliet, Shorewood
	Joliet–Plainfield city line	257.41	414.26	257	US 30 / Lincoln Highway (Plainfield Road) – Aurora, Joliet
	Plainfield	261.08	420.17	261	IL 126 west (Main Street) – Plainfield	Southbound exit and northbound entrance; eastern terminus of IL 126
	Romeoville–Bolingbrook city line	263.43	423.95	263	CR 88 (Weber Road)
	Bolingbrook	267.02	429.73	267	IL 53 (Bolingbrook Drive) – Bolingbrook, Romeoville
		268.73	432.48	268	Historic US 66 west (Joliet Road)	Southbound exit and northbound entrance; southern end of Historic US 66 concurrency
		269.34	433.46	269	I-355 (Veterans Memorial Tollway) – Southwest Suburbs, Northwest Suburbs	I-355 exit 12
DuPage	Darien	270.85	435.89	271	CR 9 (Lemont Road)	Signed as exits 271A (south) & 271B (north)
		272.86	439.13	273	CR 15 (Cass Avenue)	Signed as exits 273A (south) & 273B (north); Argonne National Laboratory
	Willowbrook–Burr Ridge city line	274.50	441.76	274	IL 83 (Kingery Highway)
DuPage–Cook county line	Burr Ridge	276.33	444.71	276A-B	County Line Road	Signed as exits 276A (south) & 276B (north)
Cook	Indian Head Park	276.80	445.47	276C	Historic US 66 east (Joliet Road)	Northbound exit and southbound entrance; northern end of Historic US 66 concurrency; southern end of Stevenson Expressway
	Indian Head Park–Countryside city line	277.57	446.71	277	I-294 (Tri-State Tollway) – Wisconsin, Indiana	Signed as exits 277A (north) & 277B (south); I-294 exit 23; no southbound exit to I-294 south
	Countryside–Hodgkins city line	278.87	448.80	279	US 12 / US 20 / US 45 (La Grange Road) to I-294 south	Signed as exits 279A (east/south) & 279B (west/north)
	Summit	282.29	454.30	282	IL 171 (1st Avenue)	Signed as exits 282A (south) & 282B (north) northbound; Brookfield Zoo
	Summit–Chicago city line	283.40	456.09	283	IL 43 (Harlem Avenue (7200 West))
	Chicago	285.57	459.58	285	Central Avenue (5600 West)
		286.67	461.35	286	IL 50 (Cicero Avenue (4800 West)) – Chicago Midway Airport
		287.74	463.07	287	Pulaski Road (4000 West)
		288.83	464.83	288	Kedzie Avenue (3200 West)	Southbound exit and northbound entrance
		289.37	465.70	289	California Avenue (2800 West)	Northbound exit and southbound entrance
		290.44	467.42	290	Damen Avenue (2000 West)
		290.96	468.25	290	Ashland Avenue (1600 West)	Northbound exit and southbound entrance
		292.34	470.48	292	I-90 / I-94 (Dan Ryan Expressway) – Indiana, Wisconsin	Signed as exits 292A (west) & 292B (east) northbound, and as exits 292 (west) & 293B (east) southbound
		292.91	471.39	293A	Cermak Road – Chinatown (2200 South)	Northbound exit and southbound entrance
		293.13	471.75	293C	State Street (0 East/West)	Southbound exit and northbound entrance
		293.61	472.52	293D	Martin L. King Drive (400 East)	Northbound exit and southbound entrance
		293.88	472.95	—	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       Concurrency terminus       Incomplete access

Related routes

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
Location	Springfield

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.[28]

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

Major junctions
The entire route is in Sangamon County.

Location	mi[29]	km	Destinations	Notes
Springfield	0.0– 0.7	0.0– 1.1	I-55 / I-72 / US 36 – Jacksonville, Decatur, Chicago, St. Louis	Exit 92A (I-55), Exit 97B (I-72)
	4.9	7.9	IL 97 north (Jefferson Street)
	5.0	8.0	IL 97 south (Madison Street)
	7.0	11.3	IL 29 (Sangamon Avenue)	Southern end of IL 29 concurrency
	8.0	12.9	IL 4 south / IL 29 north (Veterans Parkway) – Abraham Lincoln Capital Airport	Northern end of IL 29 concurrency, northern terminus of IL 4
Sherman	12.1	19.5	IL 124 west (Andrew Road) – Andrew, Athens	Eastern terminus of IL 124
	12.7	20.4	I-55 south – Springfield	Exit 105 (I-55), no access to I-55 northbound from this point
Williams Township	13.9	22.4	I-55 north – Chicago	Only access to I-55 northbound
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

Lincoln business loop

Interstate 55 Business
Location	Lincoln

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
Location	Bloomington–Normal

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.

Location	mi	km	Destinations	Notes
Bloomington			I-55 south – Springfield I-74 east / US 51 south – Champaign, Decatur I-55 north / I-74 west / US 51 north – Joliet, Peoria, Rockford	Exit 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. / Historic US 66 east (Main Street)	Diamond interchange, eastern end of Historic US 66 concurrency
			US 150 (Morrisey Drive)
			IL 9 (Empire Street) – Pekin, Gibson City	Central Illinois Regional Airport
Normal			Historic US 66 (Shelbourne Drive) – Normal	Southbound exit only
			I-55 – Joliet, Springfield	I-55 exit 167; road continues to the north as Pipeline Road
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

References

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. Archived from the original on December 31, 2013. Retrieved December 30, 2013.
17. "I-55 Bus on Shoulder Overview". Retrieved February 5, 2021.
18. "Bus on Shoulders officially permanent; Quinn signs bill" (PDF). Retrieved February 5, 2021.
19. "Southbound I-55 Ramp Closure in Wilmington" (PDF) (Press release). Illinois Department of Transportation. Retrieved February 11, 2013.
20. "I-55 Wilmington Study". Illinois Department of Transportation. Archived from the original on June 4, 2013. Retrieved February 11, 2013.
21. "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.
22. "New Mississippi River Bridge Opens to Traffic". St. Louis Post-Dispatch. February 9, 2014.
23. "I-55 at Lake Shore Drive". Retrieved February 5, 2021.
24. "Gov. Rauner Pushes to Develop Toll Lanes on I-55". Chicago: WMAQ-TV. February 4, 2016. Retrieved February 4, 2016.
25. "I-55 Managed Lane Study". Retrieved August 10, 2020.
26. "I-55 Managed Lanes Project Website". Retrieved August 10, 2020.
27. Illinois Technology Transfer Center (2006). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
28. General Highway Map: Sangamon County, Illinois (PDF) (Map). Illinois Department of Transportation. February 20, 2009. Retrieved January 2, 2013.
29. Google (January 2, 2013). "Interstate 55 Business (Springfield)" (Map). Google Maps. Google. Retrieved January 2, 2013.

External links

• Stevenson Expressway Timeline at the Chicago Public Library
• Historic, Current & Average Travel Times For The Stevenson Expressway